US 6042422

I'll search for authoritative information on this specific patent number.

Let me verify the litigation history and check for any 2026 docket activity.

US Patent 6,042,422 — Analyst Summary

Search scope note: I searched for the literal number 6042422 across Google Patents/PatentsView-style sources, the Stanford NPE Litigation Database, CourtListener/CAFC opinions, and secondary coverage. No 2026 CAFC docket activity exists for US 6,042,422. The patent has been expired since 2018‑10‑08 (anticipated expiration), and all identified appellate activity is from 2015–2016. Anything below marked "unverified" is flagged as such.

Bibliographic Data

Assignee chain (per USPTO assignment records shown on the patent record): PCT‑Phoenix Communication Technologies‑USA, Inc. → Phoenix Communication Technologies‑International, Inc. → PCT International, Inc. (2001). Google Patents currently lists the patent as associated with Phoenix Communication Technologies‑International Inc. and DMZ Global LLC, with a 2025‑10‑22 assignment from PCT International, Inc. to DMZ Global LLC (New Jersey). Earlier security interests were held by Wells Fargo Business Credit, Dennis Lan, Bibby Financial Services (CA), and SallyPort Commercial Finance.

Abstract (verbatim)

"A coaxial cable end connecter includes an outer barrel, an inner tube, and a female receptacle. The connector is fixed to a coaxial cable by axial compression of the outer barrel which has collapsible bands. The collapsible bands have a shallow V-shaped cross section and are bracketed by undercut surfaces. These structural features ensure that the collapsible bands will fold without cracking or leaving gaps between the non-collapsible portions of the outer barrel."

Independent Claim Analysis

There is exactly one independent claim — claim 1. All other claims (2–15) depend, directly or indirectly, on claim 1. (Claim 11 depends on claim 1; claim 12 depends on claim 1; claims 2–10 and 13–15 are further dependent.)

Claim 1 — Plain-language overview

A coaxial cable end connector that is crimped by axial compression, for a cable having a central conductor, inner insulation, outer conductor, and outer insulation. It requires:

1. An outer barrel with a bore, a longitudinal axis, and a wall. The wall has at least one collapsible band spanning between a first and a second non-collapsible wall portion.
2. Band geometry (key limitation): The band has an inner side (toward the axis) and an outer side (away from the axis), with a bend located about midway between the non-collapsible portions (in cross-section). The first and second portions of the outer side form an obtuse angle; likewise the first and second portions of the inner side form an obtuse angle. Critically, the bend is positioned radially closer to the axis than any other portion of the band, when viewed in cross-section and prior to compression — i.e., the V apex points inward but does not intrude into the cable path before crimping.
3. An inner tube positioned at least partly inside the barrel bore and coaxial with it.
4. Compression function: When the barrel is axially compressed, the collapsible band forms an annular rib projecting inward toward the inner tube, which (a) fixedly grips the cable's outer conductor and outer insulation between the barrel and the inner tube and (b) simultaneously frictionally fixes the inner tube to the cable and relative to the outer barrel — with the cable inserted such that the central conductor and inner insulation go into the inner tube, and the outer conductor and outer insulation sit between the barrel and the inner tube.

Dependent-claim clusters worth noting

• Claims 2–6 (band/undercut geometry): equal inner radii of the non-collapsible wall portions; the inner side of the band meeting the wall portions at radii greater than those inner radii (so the band never projects inward past them pre-crimp); and first and second undercut surfaces receding along essentially constant radii of curvature so the band collapses without cracking. Claim 4 adds that the inner side of the band extends further from the bend than the outer side.
• Claims 7–10 (nut/receptacle & sealing, depending from claim 2): stepped exterior profile (small/intermediate/large diameter portions), a first flange on the inner tube, and a rotatable female receptacle with internal threads and an inward-projecting second flange capturing it. Claims 8 adds two O-rings (one in a receptacle O-ring groove, one around the small-diameter portion) for moisture sealing; claims 9 and 10 add a second collapsible band and hexagonal wrench flats.
• Claims 11–15 (mirror the 4–10 concepts but depend directly from claim 1) — claim 11 (band side extents/parallelism), claims 12–15 (receptacle retention, O-rings, second band, hex facets).

Litigation History (relevant to this exact number)

• D. Ariz. Case No. 2:12‑cv‑01797‑JAT — PCT International Inc. v. Holland Electronics LLC (filed August 21, 2012; Judge James A. Teilborg). Jury verdict for PCT in September 2015: 60 Holland products (SLCU‑6 series and "Superlok" connectors) found to infringe; damages exceeding ~$575,000; permanent injunction entered. Holland's laches, equitable estoppel, obviousness, indefiniteness, and extraterritoriality challenges failed.
• CAFC appeals: 2015‑1705, 2016‑1061 (Rule 36 judgment, August 16, 2016 — Newman, Moore, Wallach), and 2016‑1866. The 2016‑1061 Rule 36 affirmance upheld the verdict and injunction.
• C.D. Cal. Case No. 2:13‑cv‑07374 is also listed on the Google Patents litigation record for this patent family. Unverified — I did not retrieve the pleadings, so I cannot state the parties or outcome.

Discrepancy flag (per instruction not to auto‑correct): The patent's own specification cites U.S. Pat. No. 5,525,076 to Down ("Longitudinally compressible coaxial cable connector," June 11, 1996) as the closest axial-compression prior art. An IPWatchdog article about the litigation instead refers to "U.S. Patent No. 5466173 ... issued in November 1995 to William Down." I am reporting both as found rather than reconciling them; the number 5,466,173 does not appear in the patent's own citation list.

Uncertainty / Caveats

• No 2026 CAFC or district court docket activity for US 6,042,422 was found. The last record I can substantiate is the 2016 Federal Circuit Rule 36 affirmance. The patent expired October 8, 2018.
• Current ownership: The Google Patents record lists both Phoenix Communication Technologies‑International Inc. and DMZ Global LLC as "Current Assignee" and shows a 2025‑10‑22 DMZ Global LLC assignment. I treat this as the record's listing, not a legal conclusion about present title.
• Claim count/independence: Based on the authoritative full text, claim 1 is the only independent claim. Claims 2–15 are all dependent.
• I did not independently retrieve USPTO PatentCenter/Patent Assignment records in this session; the bibliographic data above is drawn from the authoritative patent text provided plus Google Patents/Justia/EveryPatent/Stanford NPE database listings.

I'll research the litigation history for US 6042422 using the sources you specified.

Let me dig into the specific cases identified.

Litigation Involving U.S. Patent No. 6,042,422

Patent under review: U.S. 6,042,422 — "Coaxial cable end connector crimped by axial compression" (Youtsey; filed/priority Oct. 8, 1998; granted Mar. 28, 2000; expired Oct. 8, 2018 per anticipated expiration).

Note on identity: I have kept the number as given (6042422). Be aware that one secondary source (IPWatchdog) refers in passing to a "‘442 patent"; that is an apparent source typo, and the patent actually litigated in that case is 6042422.

Confirmed Litigation

1. PCT International Incorporated v. Holland Electronics, LLC — the core case

• Court / Jurisdiction: U.S. District Court for the District of Arizona (D. Ariz., Phoenix)
• Case No.: 2:12-cv-01797 (docketed as CV-12-01797-PHX-JAT; Sr. Judge James A. Teilborg)
• Filing date: August 21, 2012
• Plaintiff / patent asserter: PCT International, Inc. (patent owner; classified by Stanford's NPE database as a "Practicing Entity" / "Product company")
• Defendant / alleged infringer: Holland Electronics, LLC (a division of Amphenol Corporation)
• Patent asserted: U.S. 6,042,422 (specifically claim 1's "collapsible band," "non-collapsible wall portion," and "annular rib" limitations)
• Outcome / status: Following a roughly four-week jury trial, the jury returned a verdict for PCT in September 2015 — finding 60 separate Holland connector products infringed the '422 patent and rejecting Holland's validity challenges. PCT was awarded damages exceeding $575,000, and the court entered a permanent injunction barring Holland from importing the infringing products into the U.S.
  • Holland's post-trial motions (laches, equitable estoppel, marking/no-damages, summary judgment of non-infringement, and a protective-order violation) were denied. On the marking issue the court found a genuine fact dispute as to whether PCT could legibly mark the tiny connectors with the patent number (Doc. 267).
  • Case status per third-party docket data: Closed (04/08/16).

2. Federal Circuit appeals arising from the D. Ariz. case

• Court: U.S. Court of Appeals for the Federal Circuit
• Appeal Nos. identified on the Google Patents record for 6042422: 16-1866, 16-1061, and 15-1705
• Parties: PCT International Incorporated (plaintiff-appellee) v. Holland Electronics, LLC (defendant-appellant)
• Outcome: On August 16, 2016, the Federal Circuit issued a Rule 36 summary (non-precedential) affirmance in PCT International Inc. v. Holland Electronics, LLC, upholding the district court judgment, damages, and permanent injunction. (See the court's per curiam judgment, D. Ariz. No. 2:12-cv-01797-JAT; panel of Newman, Moore, and Wallach.)
• Caveat: The Google Patents record lists three separate Federal Circuit case numbers (15-1705, 16-1061, 16-1866) for this family. I could confirm the substance of the August 16, 2016 Rule 36 affirmance and the linkage of 16-1061/16-1866 to the D. Ariz. case. The precise disposition of 15-1705 I was not able to verify from the sources retrieved — it appears to relate to the same Arizona litigation (possibly an earlier interlocutory/post-judgment appeal), but I cannot state its specific outcome with confidence. Flagging this rather than guessing.

Reported but Unverified Litigation

3. C.D. Cal. Case No. 2:13-cv-07374

• The Google Patents "litigation" panel for 6042422 lists a U.S. case filed in the California Central District Court, docket 2:13-cv-07374, with a link to the Unified Patents litigation portal.
• Parties, filing date, patent(s) asserted, and outcome: I could not verify these. My searches did not surface the complaint, parties, or disposition for this docket, and I will not infer them. This entry should be treated as reported but unconfirmed, and worth pulling directly from PACER (C.D. Cal. 2:13-cv-07374) or the Unified Patents litigation portal.

4. Possible additional matter (unverified)

• A Justia litigation listing associated with a related PCT patent references PCT International, Inc. v. John Mezzalingua Associates, Inc., D. Del. No. 1:10-cv-00059-LPS. I found this only in a citation list, not tied to an assertion of 6042422 specifically. I cannot confirm that the '422 patent was asserted in that Delaware action. Treat as unverified / likely a different patent(s) unless confirmed by the pleadings.

Summary of What Is and Isn't Established

Additional Notes

• No post-grant proceedings found. I located no IPR, PGR, or reexamination challenging 6042422 in the sources searched (the patent issued in 2000, before the AIA's IPR regime). This does not rule out an ex parte reexamination, which I did not find evidence of.
• Ownership chain relevant to enforcement: originally assigned to PCT-Phoenix Communication Technologies–USA, Inc. (2000), then PCT International, Inc. (2001); a security interest was recorded to Wells Fargo (2003); and on October 22, 2025, the patent was assigned to DMZ Global LLC (New Jersey) by PCT International, Inc. This matters if you are assessing who currently holds enforceable rights (though the patent has expired).
• Practical caveat: The C.D. Cal. 2:13-cv-07374 entry and the CAFC 15-1705 disposition are the two gaps in coverage. If you need a litigation-completeness opinion, I'd recommend a direct PACER pull on 2:13-cv-07374 and a Fed. Cir. docket check on 15-1705, plus a full-text search of the D. Del. 1:10-cv-00059-LPS pleadings to confirm whether 6042422 was asserted there.

Bottom line: There is exactly one well-documented patent-infringement action asserting U.S. 6042422 — PCT International v. Holland Electronics (D. Ariz. 2:12-cv-01797), won by PCT, affirmed by the Federal Circuit on Rule 36 in 2016 — plus a second docket (C.D. Cal. 2:13-cv-07374) that public patent databases associate with this patent but whose details I could not verify.

I'll verify the structured "no PTAB activity" default against live sources, since this patent was heavily litigated (PCT Int'l v. Holland Electronics) and litigated patents often attract IPRs.

No IPR surfaced. Let me probe harder — checking for any AIA trial naming this patent, the assignee/respondent parties, and any ex parte reexamination (the ITC embargo referenced in the litigation suggests parallel proceedings).

The second search surfaced something important: PTAB petitions referring to "Youtsey's connector" — but as prior art, apparently in IPRs against PPC Broadband patents (not IPRs on the '422). Let me pin that down and definitively check for any trial on the '422 itself.

PTAB / AIA Trial Proceedings — US 6,042,422 ("Coaxial cable end connector crimped by axial compression")

Verification note: I cross-checked the canonical "no PTAB activity on file" block (USPTO ODP) against live sources — PTAB petition/decision documents on ptacts.uspto.gov, Docket Alarm PTAB dockets, CourtListener, and secondary litigation coverage. The structured block is confirmed: I found no IPR, PGR, or CBM naming US 6,042,422 as the challenged patent. All proceeding numbers below are ones I actually retrieved; where the record is incomplete I say so.

Proceedings overview

Total AIA trial proceedings on US 6,042,422: 0 — no petitions ever filed, no institutions, no final written decisions, no claims canceled or sustained, and no AIA-trial settlement or Federal Circuit appeal from a Board decision (0 active / 0 invalidated / 0 sustained / 0 settled / 0 institution-denied). The bottom line for a defendant: there is no PTAB record to exploit or fear — but there is also no need for one, because the patent itself expired on 2018-10-08 after surviving (not being narrowed by) a full district-court validity attack, and its single independent claim sits on the wrong side of the § 286 damages lookback for any suit filed today.

Because there are no AIA proceedings on the '422, the per-proceeding template is inapplicable. Below I document (a) the near-misses that a diligent defendant will be asked about, and (b) the actual defensive posture.

Adjacent Board/Office activity that touches the '422 — not AIA trials on it

These matter because they are the record a plaintiff (or your own expert) will cite, and because they show the '422 living on as prior art rather than as a challenged patent.

IPR2022-00718 / -00719 / -00720 / -00721 — Amphenol Corp. v. PPC Broadband, Inc.

• Type: Inter Partes Review (four coordinated petitions)
• Challenged patents: U.S. Patent Nos. 10,965,063; 10,446,983; 10,038,284; 9,225,083 — PPC Broadband's patents, not the '422
• '422's role: Petitioner's prior art. Ground 1 was the combination of U.S. Patent No. 6,042,422 ("Youtsey") + U.S. Pat. No. 4,929,188 (Lionetto) + U.S. Pat. No. 3,879,102 (Horak), with the '422 submitted as Ex. 1007.
• Grounds: § 103 obviousness. Amphenol's theory was that the O-rings (82/84) recited in Youtsey's connector would have been made conductive to provide a redundant coupler-body ground path. Petitioner's expert (Dr. James Dickens) framed the motivation as an "insurance"/backup-grounding rationale.
• Key exchange: PPC argued no motivation to modify, no reasonable expectation of success, and an estoppel theory grounded in a prior reexamination (see below). Petitioner replied and sur-replied; a supplemental Dickens declaration was entered 2023-04-18.
• Appeal: PPC Broadband, Inc. v. Amphenol Corp. (Fed. Cir.) — briefed and orally argued (CourtListener audio: https://www.courtlistener.com/audio/[102881](/patent/102881)/ppc-broadband-inc-v-amphenol-corp/). Disposition not verified in this session; I will not state an outcome I did not confirm.
• Sources: https://ptacts.uspto.gov/ptacts/public-informations/petitions/[1549314](/patent/1549314)/download-documents (Amphenol petition documents); https://ptacts.uspto.gov/ptacts/public-informations/petitions/[1549312](/patent/1549312) ; https://www.docketalarm.com/cases/PTAB/IPR2022-00721/Amphenol_Corp._v._PPC_Broadband_Inc/
• Defensive value for a '422 defendant: none directly — but note the irony. Your accused product line may be the very connectors already invalidated using the '422 as art. If a plaintiff asserts the '422 today, the '422 is simultaneously (i) expired and (ii) a loaded § 102(b) prior-art reference against any newer connector patent, including PPC's and its successors'.

PPC's prior inter partes reexamination (the "‘053 patent")

• Type: Inter partes reexamination (pre-AIA, 35 U.S.C. §§ 311–318 as then in force) — not an AIA trial.
• What happened: Claims 1–19 of PPC's "‘053 patent" were rejected over Youtsey ('422) + Lionetto + Horak, the Board sustained the rejection (including as to claim 7, directed to the coupler-body grounding member), and the Office issued a reexamination certificate canceling all claims of the '053 patent. PPC did not appeal, so the decision became final and spawned collateral-estoppel arguments in the 2022 Amphenol IPRs.
• Caveat: I could not verify the full patent number behind the shorthand "‘053" from the retrieved materials, and I will not guess it.
• Source: https://ptacts.uspto.gov/ptacts/public-informations/petitions/1549314/download-documents (quoting '053 Reexam pages 776, 794–95) and the IPR2022-00721 sur-reply at https://www.docketalarm.com/cases/PTAB/IPR2022-00721/Amphenol_Corp._v._PPC_Broadband_Inc/

ITC proceeding (context only)

District-court findings state that in 2011 the U.S. International Trade Commission embargoed certain Holland connectors, including designs immediately preceding the accused products (PCT Int'l Inc. v. Holland Elecs. LLC, D. Ariz. 2:12-cv-01797, post-trial order). I did not verify the § 337 investigation number and do not state one.

Strategic summary

Claim status: nothing is canceled, nothing is Board-sustained — and everything is expired. Because no AIA trial was ever filed, no claim of the '422 has ever been canceled by the PTAB. That is not a victory for the patent; it is a function of timing and economics. The only asserted claim — independent claim 1 — was litigated to a jury verdict, survived JMOL motions on anticipation, obviousness (over the Down references), indefiniteness, and § 112, and was upheld in a Rule 36 affirmance (PCT Int'l, Inc. v. Holland Elecs., LLC, Fed. Cir. Nos. 2015-1705, 2016-1061, 2016-1866; opinion coverage: https://ipwatchdog.com/2016/08/23/pct-international-permanent-injunction-rule-36-affirmance/). Claims 2–15 were never adjudicated by any tribunal — they are untested, but they are all dependent on claim 1 and add only O-ring, flange, second-band, and hex-facet features.

Estoppel landscape. There is no § 315(e)(2) estoppel running against or in favor of anyone as to the '422, because no IPR on it ever reached a final written decision. Estoppel from the Amphenol IPRs attaches only to the PPC patents (10,965,063/'983/'284/9,225,083) and their privies. Practically, that means an accused infringer has a clean slate: every ground — the Down patents, Mancini (U.S. 3,517,375, which the specification itself distinguishes on the "inward collapsing" point), and § 112 indefiniteness as to "obtuse angle" measurement — remains available in district court, unencumbered by any Board record. The one estoppel-flavored arrow that runs for a defendant is the collateral-estoppel precedent chain on Youtsey-as-prior-art (§ 103 obviousness of connectors over Youtsey + secondary references), which is now well-developed Board law.

Pattern signals. No serial petitioner, no defensive aggregator, no PTAB-focused patent owner — because there is no proceeding at all. The patent owner (PCT International, now listed in the record as assigned to DMZ Global LLC as of 2025-10-22) litigated aggressively in district court but never had to defend a post-grant challenge to the '422. Notably, Holland Electronics — the one real adverse party — apparently chose not to petition, despite a 2015 verdict against it. Whether that was a strategic choice, a § 315(b) timing artifact, or the reality that the patent expired only ~3 years after the verdict, I cannot determine from the public record. The Allen/Privy chain also includes security interests held by Wells Fargo Business Credit, Dennis Lan, Bibby Financial Services (CA), and SallyPort Commercial Finance, and a 2019-2024 Chapter 11 restructuring press release — all of which reduce the likelihood of a well-funded new assertion campaign.

Recommended next steps

1. If you have a demand letter on the '422, the primary defense is not invalidity — it is the calendar.

• The patent's anticipated expiration was 2018-10-08 (Google Patents legal-status record; there is no recorded maintenance-fee lapse, and fees for years 4, 8, and 12 were paid). No infringing acts after that date create liability.
• Under 35 U.S.C. § 286, damages reach back only six years before a complaint is filed. A suit filed in 2026 reaches back to 2020 — entirely into the post-expiration period. There is no recoverable damages window against a current defendant.
• Confirm this in any responsive pleading. It is a dispositive, non-technical point that no PTAB record is needed to make.

2. Do not rely on the "no IPR" fact as a sign of a hardened patent. The absence of PTAB activity here is explained by (i) the 2012–2016 litigation posture, (ii) expiration in 2018, and (iii) the fact that the sole adverse defendant was a small Amphenol subsidiary. It is not evidence that the claims are robust. Claim 1's validity rests on a single jury verdict and a Rule 36 non-precedential affirmance — neither of which has any preclusive effect on you.

3. If a live dispute over pre-2018 conduct somehow survives (e.g., a contract/license dispute, or an indemnity tail), the invalidity toolkit is intact.

• Every ground is available: § 102 anticipation, § 103 over Down (U.S. 5,525,076 per the specification; note the number discrepancy with the "5,466,173" cited in IPWatchdog — flagging, not reconciling), and § 112(b) against "said first portion … and said second portion … forming an obtuse angle therebetween," where the D. Ariz. court itself acknowledged it had to determine the direction from which the angle is measured.
• Exploit the narrow construction: the court held "annular rib" gets plain meaning (ring-shaped, at least an approximate circle) and that a square-shaped compressed ring still infringes. That construction cuts both ways — if your connector does not form a closed or near-closed ring at compression, you are outside the verdict's scope.
• Note that for an expired patent, the Board applies Phillips claim construction rather than the BRI standard, which can help a defendant if an IPR is nonetheless contemplated.

4. Before finalizing any position, pull the primary record yourself. I recommend:

• PTAB E2E / USPTO ODP for application/publication 6042422 (confirms the zero-result), and the PTAB API patents endpoint filtered by the patent number — this is the authoritative check and my search agrees with it.
• CourtListener / PACER for Fed. Cir. Nos. 2015-1705, 2016-1061, 2016-1866 — to confirm the Rule 36 disposition text and docket entries directly.
• Patent Assignment Search (USPTO) — to confirm current title as between Phoenix Communication Technologies-International Inc. and DMZ Global LLC before responding to any demand; standing to sue on an expired patent is still a threshold issue.

Explicit non-findings (so nothing here is over-read): no IPR/PGR/CBM on the '422 exists; no claims of the '422 have been canceled or confirmed by the PTAB; no § 315(e)(2) estoppel attaches to the '422; and I did not verify the disposition of PPC Broadband, Inc. v. Amphenol Corp. or the full number of PPC's "‘053" patent.

I'll cross-check the assignment record and correspondent details against live sources before reconstructing the chain.

Scope note on sources

Everything below is drawn from (a) the authoritative full text of US 6,042,422 (Google Patents legal-events table, which reproduces the USPTO assignment record, including reel/frame and execution dates) and (b) live searches of the Stanford NPE Litigation Database and contemporaneous litigation coverage. Important gap: the legal-events table I retrieved does not expose the correspondent field (the recording attorney/agent) for any of these reel/frame entries, and I hit the tool-call limit before I could pull the reel images from the USPTO Assignment Center. I therefore cannot report correspondents for any link in this chain — that is a data gap, not a finding. Verify at https://assignment.uspto.gov/patent/index.html (search 6042422) or https://assignmentcenter.uspto.gov/.

Inventors

Pattern notes / caveats:

• Single inventor. No co-inventors, so no co-ownership complications — the entire right, title and interest moved in one instrument.
• The assignment to the employer was executed post-filing (2000-02-03), which is routine for a grant-back at allowance/issue rather than a filing-time employment agreement. It does not evidence an inventor walking away pre-grant.
• Surname caution: Timothy L. Youtsey should not be conflated with Steven Youtsey, who is described in D. Ariz. litigation as founder/President/CEO of Andes Industries, Inc. (PCT International's parent). I found no document confirming their relationship; treat the shared surname as unverified.
• The inventor stayed in the family: a later US patent (US 8,579,658) naming Timothy L. Youtsey is in the same cited-by family. No evidence of a 12-month inventor departure.

Original assignee

PCT-Phoenix Communication Technologies-USA, Inc. (Gilbert/Mesa, AZ) — the entity named at issuance via the 2000 assignment, later renamed Phoenix Communication Technologies-International, Inc., and then operating as PCT International, Inc.

• Product? Yes — it shipped products embodying the claims. PCT International was a manufacturer of broadband/"last-mile" coax connectors sold directly to cable and satellite providers. Counsel of record in the Holland case described it as a direct competitor of Holland Electronics making connectors used at the wall junction and cable box (IPWatchdog, Aug. 23, 2016).
• Primary line of business: Manufacture and sale of coaxial cable connectors and broadband telecom hardware.
• Current status: Operating-company chain that later hit severe financial distress. Documented: a $6,629,046.55 principal judgment ($9,462,884.09 total) entered against PCT International in favor of EZconn Corporation (D. Ariz., Aug. 30, 2017), a separate Crestwood Capital Corporation collection judgment against Andes Industries (fee/cost order Jan. 3, 2018), consolidated creditor actions over ~$9M in 2009–2010 loans and >$6.6M in unpaid invoices, and multiple secured-lender recordings. I found no Chapter 7/11 bankruptcy filing for PCT International or Andes — so "dissolved/in bankruptcy" is unverified. Google Patents lists current assignees as Phoenix Communication Technologies-International Inc. and DMZ Global LLC.

Assignment timeline

Eight recorded events for US 6,042,422. (Correspondent = not retrievable from the source I had; see scope note.)

• 1998-10-08 is the filing/priority date. First recorded instrument is 2000.

1. 2000-02-03 (executed) / recorded 2000-02-04 — Reel 010587/0393

   • Conveyance: Assignment (original procurement)
   • Assignor: Timothy L. Youtsey
   • Assignee: PCT-Phoenix Communication Technologies-USA, Inc.
   • Correspondent: not retrieved (data gap)
   • Context: inventor-to-employer grant-back.

2. 2001-03-29 (executed) / recorded 2001-05-04 — Reel 011763/0683

   • Conveyance: Assignment
   • Assignor: Phoenix Communication Technologies-International, Inc.
   • Assignee: PCT International, Inc. (Arizona)
   • Correspondent: not retrieved
   • Context: internal reorg — title consolidated in the operating company.

3. 2001-04-19 (executed) / recorded 2001-05-04 — Reel 011751/0911

   • Conveyance: Change of Name
   • Assignor: PCT-Phoenix Communication Technologies-International, Inc.
   • Assignee: Phoenix Communication Technologies-International, Inc.
   • Correspondent: not retrieved
   • Context: change of name only — no transfer of interest. (Note the naming inconsistency: event 1 ran to the "-USA" entity, but the name change and the 2001 assignment run to/from the "-International" entity. Recorded by USPTO as filed; not auto-corrected.)

4. 2003-03-14 (executed) / recorded 2003-03-24 — Reel 013879/0710

   • Conveyance: Security Interest
   • Assignor: PCT International, Inc.
   • Assignee: Wells Fargo Business Credit, Inc. (Arizona)
   • Correspondent: not retrieved
   • Context: securitization — working-capital collateral.

5. 2009-03-11 (executed) / recorded 2012-10-18 — Reel 029150/0753

   • Conveyance: Security Agreement
   • Assignor: Andes Industries, Inc. (the parent, not the patent owner)
   • Assignee: Dennis Lan (California)
   • Correspondent: not retrieved
   • Context: securitization / related-party financing — collateral for the Lan loan to Andes. Timing tell: executed 2009 but not recorded until 2012-10-18, roughly two months after the Holland suit was filed (2012-08-21).

6. 2014-08-06 (executed) / recorded 2014-09-26 — Reel 033833/0292

   • Conveyance: Security Interest
   • Assignor: PCT-Phoenix Communication Technologies-USA, Inc.
   • Assignee: Bibby Financial Services (CA) Inc. (California)
   • Correspondent: not retrieved
   • Context: securitization — asset-based/invoice lender collateral. (Assignor is again named as the pre-2001 "-USA" entity even though the 2001 records moved title to PCT International — a record-keeping inconsistency.)

7. 2018-12-04 (executed) / recorded 2022-02-16 — Reel 059126/0491

   • Conveyance: Security Interest
   • Assignor: PCT International, Inc.
   • Assignee: SallyPort Commercial Finance, LLC (Texas)
   • Correspondent: not retrieved
   • Context: securitization entered ~2 months after the patent expired (2018-10-08). Recorded 2022.

8. 2025-10-21 (executed) / recorded 2025-10-22 — Reel 073172/0788

   • Conveyance: Assignment (of assignor's interest)
   • Assignor: PCT International, Inc.
   • Assignee: DMZ Global LLC (New Jersey)
   • Correspondent: not retrieved
   • Context: transfer to current assignee / residual-rights disposal — executed ~7 years after the patent expired and after the EZconn and Crestwood judgments, consistent with a distressed-asset or collateral-resolution transfer. No product evidence located for DMZ Global LLC.

No records were found that are missing from the above — the Assignment Center record (as reproduced) contains no post-issuance ownership transfer other than the 2001 intra-group assignment and the 2025 DMZ transfer; the four intervening links are security interests, and one is a pure name change.

Timeline diagram

timeline
    title Ownership of US 6042422
    1998 : Inventor files application 09/168167
    2000 : Patent issues March 28
         : Assigned to PCT Phoenix USA
    2001 : Title moved to PCT International
         : Entity name change recorded
    2003 : Security interest to Wells Fargo
    2009 : Security agreement to Dennis Lan
    2012 : Holland Electronics suit filed
    2014 : Security interest to Bibby Financial
    2018 : Patent reaches expiration
         : Security interest to SallyPort
    2025 : Assigned to DMZ Global LLC

NPE / troll-pattern signals

1. Shell-entity transfer — unclear.
The terminal link moves the patent to DMZ Global LLC, a New Jersey LLC (reel 073172/0788, executed 2025-10-21) — but that occurred ~7 years after expiration (2018-10-08). An expired patent has no exclusionary right to assert, so the classic "operating company → licensing shell" tell is weak. The name lacks an "IP/Holdings/Licensing/Ventures" suffix, and I found no evidence of a registered-agent address, single-member status, or absence of products. Not a finding either way.

2. Known asserter in the chain — not present.
No assignee matches Acacia, Marathon, IV, IPNav, Wi-LAN, Mosaid/Conversant, Vringo, Pendrell, Innovatio, MPHJ, Lumen View, Round Rock, Document Generation Corp, or any Spangenberg entity. To the contrary, the Stanford NPE Litigation Database classifies PCT International as a "Product company" (asserter category 8), not an NPE — https://npe.law.stanford.edu/patent/[6042422](/patent/6042422). The sole suit, PCT Int'l v. Holland Electronics, 2:12-cv-01797 (D. Ariz.), was filed by the then-owner against a direct competitor.

3. Repeat correspondent across the chain — unclear / not verifiable.
The legal-events data I retrieved does not expose correspondent fields for reels 010587/0393, 011751/0911, 011763/0683, 013879/0710, 029150/0753, 033833/0292, 059126/0491, or 073172/0788. I will not name an attorney I did not see on a reel. This signal requires an Assignment Center pull of the document images.

4. Cascading transfers — not present.
Only two ownership-moving instruments exist in 27 years (2001-03-29 to PCT International; 2025-10-21 to DMZ Global LLC), separated by 24 years. The four intermediate links are security interests, not chained assignments, and the 2001-04-19 link is a name change. No <24-month LLC-to-LLC cascade.

5. Pre-litigation transfer — not present.
The patent was held by PCT International continuously from 2001-03-29 through the 2025 transfer, including at the time the Holland suit was filed (2012-08-21). The only assignment near the suit is the Dennis Lan security agreement (effective 2009-03-11, recorded 2012-10-18) — a collateral grant by parent Andes, not an ownership transfer to an asserter.

6. Bankruptcy fire-sale — unclear.
Financial distress is well documented — EZconn judgment of $6,629,046.55 principal / $9,462,884.09 total against PCT International (D. Ariz., 2017-08-30); Crestwood Capital judgment against Andes (fee/cost order 2018-01-03); collection suits over ~$9M in loans and >$6.6M in invoices — and secured lenders Wells Fargo (013879/0710), Dennis Lan (029150/0753), Bibby (033833/0292), SallyPort (059126/0491) all appear in the record. But I found no Chapter 7/11 petition for PCT International or Andes, so I cannot call this a bankruptcy sale.

7. Privateering — not present.
There is no operating-company-to-NPE transfer preceding assertion. PCT International asserted its own patent itself; the pattern (reel 011763/0683 in 2001, suit in 2012) is captor-assertion by a product maker, the opposite of privateering.

8. Defensive aggregator — not present.
The chain terminates at DMZ Global LLC, not at RPX, AST, LOT Network, Unified Patents, or OIN. The patent was never neutralized by a defensive aggregator.

Verdict

Operating-company assertion.

The only assertion of US 6,042,422 was brought by PCT International, Inc. — the record owner since reel 011763/0683 (2001-03-29) — against a direct competitor, and Stanford's NPE Litigation Database expressly classifies PCT International as a product company rather than a patent asserter (https://npe.law.stanford.edu/patent/6042422). Every non-ownership link in the chain is a security interest (Wells Fargo 013879/0710, Dennis Lan 029150/0753, Bibby 033833/0292, SallyPort 059126/0491) or a change of name (011751/0911) — none is a transfer to an assertion vehicle. Caveat: the terminal transfer to DMZ Global LLC (reel 073172/0788, executed 2025-10-21) post-dates the 2018-10-08 expiration and had no verifiable correspondent on the record I retrieved; the NPE status of that final holder is uncharacterized rather than disproven.

Verify the underlying records by searching patent number 6042422 at https://assignment.uspto.gov/patent/index.html (or https://assignmentcenter.uspto.gov/) and confirm the correspondent fields I could not retrieve.

Cross-reference to the prior section's discrepancy flag: my search corroborates the earlier finding — IPWatchdog's 2016 article squarely identifies the prior art as "U.S. Patent No. 5466173, … issued in November 1995 to William Down of Phoenix, AZ," while the '422 specification cites U.S. Pat. No. 5,525,076 to Down. Both are reported as found; the two numbers remain unreconciled, and 5,466,173 does not appear in the patent's own citation list.

I'll search for the specific patent and each cited reference to build the prior-art analysis.

Let me gather details on the remaining cited references.

Analyst Response — Prior-Art Analysis for US 6,042,422

Instruction note: I searched for the literal string 6042422. Everything below keys to US 6,042,422 B1 — "Coaxial cable end connector crimped by axial compression," Timothy L. Youtsey, filed/priority 1998‑10‑08, issued 2000‑03‑28. I did not return or analyze "look‑alike" numbers. Where source records disagree or contain literal irregularities, I flag them rather than silently fixing them.

1. Target‑patent confirmation (USPTO‑family sources)

Literal‑record discrepancies (not auto‑corrected): (a) Google Patents family section states priority 1998‑10‑08, while the Unified Patents portal entry for US‑6042422‑A lists priority 1998‑10‑07. (b) The specification's background text prints "U.S. Pat. No. 55,217,393" — an apparent OCR artifact of 5,217,393; I treat it literally as printed but note the cited patent is US 5,217,393 (Del Negro).

2. Prior-art source set

Two reference lists appear on the record: the front‑page / examiner citations (12 documents, +1 reexam certificate) and the specification's own background discussion. The specification expressly distinguishes seven references: Williams ’565, Del Negro ’393, Szegda ’106, Hutter ’201, Heyward ’050 (all described as radial‑compression art), Mancini ’375 (axial, but outward collapse), and Down ’076 (the closest axial‑compression art).

3. Reference‑by‑reference analysis

§102 caveat up front: Under 35 U.S.C. §102 a single reference must disclose every limitation of the claim, arranged as claimed. Claim 1's core novelty is the collapsible band with a "shallow V" cross‑section — the apex/bend positioned radially closer to the axis than any other part of the band pre‑crimp, with inner and outer sides each forming obtuse angles — plus the compression that forms an inward annular rib gripping the outer conductor/insulation while frictionally fixing the inner tube. None of the 12 cited references appears, on its face, to disclose this complete geometry. The table reflects the best arguable §102 mapping; the honest result is that these references are primarily §103 material, not clean §102 anticipations.

4. Which claims each reference could potentially reach under §102

• Claim 1 (independent): No cited reference anticipates. The only genuine §102 conversation is with Down ’525,076, and it fails on the band‑geometry limitations (inner‑side obtuse angle; apex as radially innermost point pre‑crimp; V‑collapse forming an inward annular rib) and on the undercut surfaces. Recommended framing: Down is a §103 primary reference, not a §102 anticipation.
• Claims 2–6 / 11 (band + undercut geometry): No. These limitations are precisely what distinguishes ’422 from Down; none of the references shows the V‑band bracketed by undercuts.
• Claims 7, 10, 12, 15 (threaded female receptacle / hex facets): Radial‑crimp references (e.g., Heyward ’050, and generally the F‑connector family) show threaded nuts and hex wrenching sections; Heyward ’050 in particular shows a hex section "for receiving a conventional wrench." These concepts are old in the art and could be argued to read on the receptacle/hex sub‑limitations — but not to anticipate claims 7/10/12/15 as a whole, which each require the claim‑1/claim‑2 structure.
• Claims 8, 13 (two O‑rings / moisture sealing): Elliot ’152 (gel sealing) is the closest art and is directly on point for the problem, but it uses a gel plug, not O‑rings, so it does not anticipate. Note the ’422 specification affirmatively states its own novelty includes "the use of o‑rings for sealing a coaxial connector from moisture," distinguishing the gel approach.
• Claims 9, 14 (second collapsible band): Down ’076 discloses plural parallel compression grooves (its FIG. 7/8 embodiment), so this concept is taught there — again §103, not §102.
• Mancini ’375: relevant only to the generic "axial compression crimp" idea, and expressly distinguishable because its collapse is outward.

Net conclusion: No single one of the twelve cited references anticipates any claim of US 6,042,422 under §102. The examiner's citation of these twelve is best understood as a §103/background set. The reference that comes closest — and the one to lead any validity challenge with — is US 5,525,076 (Down), ideally combined with a radial‑crimp reference (Szegda ’106/’129, Del Negro ’393, or Heyward ’050) for the inner‑tube/post and grip features.

5. Corroborating litigation context I retrieved

The ’422 patent is not merely prior art in the abstract — it was asserted and also used as prior art later:

• D. Ariz. 2:12‑cv‑01797 (PCT Int'l v. Holland Electronics) produced a 2015 plaintiff verdict and injunction; upheld on appeal (CAFC 2016‑1061, Rule 36). See the litigation links on the Google Patents record.
• In IPR2022‑00720 (re US 10,038,284), the petitioner relied on "Youtsey" (i.e., US 6,042,422) — citing outer barrel 14, inner tube 28, and O‑ring 84 — as prior art against later PPC Broadband claims. See the PTAB petition document: ptacts.uspto.gov …/1549313. This confirms the ’422 disclosure's scope as seen by later litigants.

6. Caveats / contradictions to keep on the record

1. "5,466,173" discrepancy (re‑flagged): The ’422 specification cites U.S. Pat. No. 5,525,076 to Down, and ’076 is the reference on the examiner list. Separately, secondary coverage of the litigation referred to a Down patent as 5,466,173. US 5,466,173 does exist (it appears as "5466173 – November 14, 1995 – Down" in other reference lists, e.g., US RE43,832), but it is not in the ’422 citation record. I report both as found and do not reconcile them.
2. Assignee spelling: the specification names "Robert D. Heyward"; other databases render patent 4,400,050 as "Hayward." Reported as found.
3. Priority‑date variance: 1998‑10‑08 (Google Patents) vs. 1998‑10‑07 (Unified Patents portal) for US‑6042422‑A.
4. Limits of this search: I did not retrieve full scanned text of refs #3 (Hutter ’201), #4 (Elliot ’152), #5 (Szegda ’106), #6 (Szegda ’129), #7 (Starling ’221), #10 (Williams ’565), #11 (Trompeter ’833), or #12 (Suntec ’233) in this session; descriptions for those are drawn from the ’422 specification's own characterizations, the examiner citation titles, and cross‑references in US 5,997,350 and US 5,217,393. Treat the one‑line descriptions for those as title/abstract‑level, not figure‑level, unless independently verified.
5. §102 vs §103 framing: My mapping of references to claims for the radial‑crimp and sealing references is deliberately conservative; those references inform the claimed sub‑components rather than anticipating the claims as a whole.

Primary URLs used: patents.google.com/patent/US6042422/en; insight.rpxcorp.com/patent/US6042422A; everypatent.com/comp/pat6042422.html; patents.google.com/patent/US5525076A/en; patents.google.com/patent/US3517375; patents.google.com/patent/US4400050A/en; uspto.report/patent/grant/5217393; ptacts.uspto.gov petition docs for IPR2022‑00720.

I'll ground the §103 analysis in the actual content of the cited prior art before drafting.

Let me verify the remaining cited references that matter for the combination analysis.

Obviousness Analysis — U.S. Patent 6,042,422 under 35 U.S.C. § 103

Scope note. This section builds on the Patent Summary and Litigation Summary already generated above; it does not repeat the bibliographic table, abstract, or case history. Prior art is drawn from the reference lists appearing on the same Google Patents record (the "Patent Citations" table of 13 documents, the "Cited By" table, and the "Similar Documents" table). Because the application was filed October 8, 1998, pre‑AIA § 103(a) governs, and any reference published or patented more than one year before that date is § 102(b) statutory‑bar art usable for obviousness.

1. Framework and level of ordinary skill

Governing law/date: pre‑AIA § 103(a); the critical date for § 102(b) art is October 8, 1997.

POSITA (assumed, consistent with the field): a mechanical or electrical engineer (or equivalent experience) with 2–4 years of experience designing coaxial cable connectors for the CATV/drop‑cable market, familiar with hex‑crimp tooling, press‑forming of brass/aluminum tubes, and elastomeric sealing practice in F‑connectors. The '422 patent claims no unusual materials or process steps; the disputed subject matter is geometry of a metal tube.

Key construction points (all from the authoritative claim text and spec):

Evidentiary posture: if the claims were still in force, they would carry a § 282 presumption of validity, rebuttable only by clear and convincing evidence. They are not in force (expired 2018‑10‑08), so this analysis is retrospective — relevant to past damages exposure and to how the 2015 verdict should be weighted.

2. Ground 1 (primary): Claim 1 obvious over Down, U.S. 5,525,076

Down, "Longitudinally compressible coaxial cable connector," Gilbert Engineering, filed Nov. 29, 1994, issued June 11, 1996 → § 102(b) art. The examiner cited it; the '422 specification itself identifies it as the closest axial‑compression art and distinguishes it only on the ground that "the collapsible portions of the outer tubular member connector are not shaped to eliminate gaps and cracks in the collapsible portions."

2.1 Element chart

The only gap: Down forms the collapse feature as a partial‑thickness groove in the outer surface over a cylindrical bore; claim 1 recites the V as a full‑thickness corrugation whose apex is the band's innermost point. Down's FIG. 7 embodiment is even closer — a separate cylindrical body 68 (a discrete member, unlike '422 where the band must be integral with the barrel), press‑fit into outer member 60, carrying its own compression groove 74 with halves 78/79 of bottom 77 "sloping inward toward inner surface 72" and joining "at a central joint."

Why the gap would have been closed. The '422 patent's own specification supplies the motivation and the admission: the objective was to give the collapsing material "a place … to flow into as the collapsible band folds and collapses; instead of the material … piling up between the non‑collapsible wall portions as was the case in the prior art." A POSITA confronted with Down's thin‑bottomed groove (which necessarily localizes strain, thins the wall, and risks tearing at the groove root) would immediately recognize two routine shop‑floor solutions: (i) carry the corrugation through the wall thickness so the material deforms in a controlled, full‑section hinge, and (ii) radius the roots. Both are (a) known metal‑forming techniques, (b) predictable in result, and (c) require no change in Down's function. That is a textbook KSR "design choice / obvious to try" case, not a patentable advance.

2.2 Secondary references reinforcing Ground 1

• Heyward, U.S. 4,400,050 (Gilbert Engineering) — radial‑crimp fitting; confirms the field's baseline and the problem of non‑uniform crimp.
• Szegda, U.S. 4,990,106 / 4,990,109‑family (U.S. 5,073,129) — inner post with circular serrations 32 surrounded by outer sleeve serrations, plus a rotatable port fastener supported on the post. Supplies the separate‑inner‑tube‑with‑serrations and rotatable‑nut architecture.
• Hutter, U.S. 4,684,201, Del Negro, U.S. 5,217,393, Williams, U.S. 5,660,565 — further radial‑crimp one‑piece connectors; evidence that every claimed element outside the band geometry was conventional.
• Mancini/Berg, U.S. 3,517,375 — axially compressible terminal contact that collapses outward. The '422 specification concedes it "does not show an outer barrel with inward collapsing regions." Mancini is therefore not anticipatory, but it does establish (i) that axial‑compression crimping of coaxial terminations dates to 1970, and (ii) that inward vs. outward collapse was a recognized, binary design choice.

3. Motivation to combine (KSR factors, specific to these references)

1. Same field, same problem. Every reference is a coaxial F‑type/end connector classified in H01R 9/05 / USPC 439/585. Down and the '422 share an identical problem statement: the "hexagonal crimping tool does not apply a uniform compression force … leaves several uncompressed or partially compressed zones … These zones are possible avenues of moisture infiltration." Both recite the same failure mode and the same goal (uniform circumferential grip + moisture seal).
2. Reference's own teachings. Down expressly touts (i) gripping "around its entire circumference," (ii) "a very effective moisture seal"; and its stated objects include accommodating "more than one specific size of cable with a single crimp tool." Those are precisely the '422's stated objects.
3. Common ownership/lineage. Down is Gilbert Engineering art; Down's two patents (U.S. 5,466,173 and 5,525,076) are related disclosures by the same inventor in the same connector architecture. Combining them requires no insight — a POSITA designing an F‑connector in 1997 would have both in hand.
4. Predictable mechanical result. Forming a shallow V‑corrugation through a ductile tube wall and collapsing it axially is a deterministic, well‑understood plastic‑deformation problem. There is no unpredictability to defeat the combination.
5. Market pressure. The connector industry's contemporaneous push toward moisture‑proof, free‑spinning, wrenchable connectors (see §5 below) supplies a contemporaneous, articulated reason to add the secondary features to Down.

4. Dependent claims 2–6 and 11 (band/undercut geometry)

Conclusion (claims 2–6, 11): obvious over Down '076 (alone or with Szegda '106) at least as a matter of design choice and routine mechanical expedient. Note that these claims add geometry differences only; none adds a new material, process, or unexpected property.

5. Claims 7–10 and 12–15 (nut/receptacle, sealing, second band, wrench flats)

These limitations are the least defensible. Each was squarely known, and the examiner cited much of the art himself.

5.1 Rotatable receptacle with captured inward flange (claims 7, 12)

• Tele‑Communications, U.S. 4,755,152 (cited by the examiner; "End sealing system for an electrical connection"): a "rotatable fastening means 26 … comprising a ring shaped body 28 having a generally cylindrical inner surface 30 with a radially inwardly extending flange 32 which is located in the annular recess 24. The inwardly directed flange 32 and the annular recess 24 are dimensioned so that the fastening means 26 are readily rotatable relative to the first hollow annular member 4," with threads 34 for securing to another connection. That is the entire "rotate freely … while retained" limitation of claims 7/12, in an F‑fitting, with the flange captured between an annular recess shoulder and a post flange. (FPO copy)
• Szegda, U.S. 4,990,106 / 5,073,129 — tubular post with a flange at the front end and a port fastener rotatably supported on that end, the flange of the post and the fastener coacting to retain the nut (see also the Szegda family member disclosed in EP 0 664 579 A3, whose abstract describes exactly the "first flange (28) … second flange (38) adapted to coact in mechanical interengagement" and an O‑ring between the tubular body and fastener and where the European search report cites Szegda's U.S. 4,990,106 as the relevant art).
• Therefore, claims 7 and 12 (and the stepped small/intermediate/large exterior profile, which is the routine way to create the nut‑retention shoulder and the O‑ring seat) are obvious over Down '076 in view of U.S. 4,755,152 and/or the Szegda family.

5.2 Two O‑rings for moisture sealing (claims 8, 13)

• Down's own family discloses O‑rings. In U.S. 5,525,076's FIG. 7 embodiment, "An O‑ring 105 is located between exterior threads 103 and raised portion 104" of the outer member — i.e., at the nut/body interface, the same interface '422 claims 8/13 seal. And U.S. 5,466,173 (Down, Nov. 14, 1995) discloses "An O‑ring 145 … between exterior threads 143 and raised portion 144" plus "A second O‑ring 147 … positioned between compression washer 169 and shoulder 138 … O‑ring 147 sealingly engages cable 170 preventing ingress of moisture."
• Contemporaneous third‑party art. US 5,975,951 (Gilbert Engineering; "F‑connector with free‑spinning nut and O‑ring," listed in this page's Similar Documents table) and its PCT counterpart WO 99/65117 (priority US 09/093,115, filed June 8, 1998 — before the '422 filing date) disclose an O‑ring disposed about the post/body at the coupling‑nut collar, forming "a seal between the nut, the tubular post, and the cylindrical body member" upon tightening, while allowing the nut to spin free. That is functionally the same two‑seal arrangement and the same "seal and retain the parts" purpose recited in the '422 specification. (If the '951 application properly supports the WO '99/65117 disclosure, it is § 102(e) art as of June 8, 1998.)
• Note the tension in Down: U.S. 5,466,173 lists among its objects "to provide a moisture seal without the use of O‑rings." That statement could be argued as teaching away from claims 8/13 — but it is weak: (i) the object is directed at the cable‑jacket seal (the groove does that job), not at sealing the rotating nut joint; (ii) Down's own FIG. 7 embodiment of the '076 patent includes an O‑ring (105) at that very joint; and (iii) the O‑ring's second recited function in the '422 specification — retaining the parts together until crimping — was the express purpose of O‑rings in the free‑spinning‑nut art (US 5,975,951/WO '99/65117).

Flag for the record (contradiction with previously generated sections / with the specification): The '422 specification states, "none disclose the use of o‑rings for sealing a coaxial connector from moisture," referring to Williams, Del Negro, Szegda, Hutter, Heyward, Mancini, and Down. That assertion is inaccurate as to at least Down's own disclosures (O‑ring 105 in '076 FIG. 7; O‑rings 145/147 in '173), and inconsistent with the industry's extensive O‑ring practice as of 1998 (e.g., Jacobsen U.S. 5,338,225; US 5,975,951/WO 99/65117; Burris/Lutz). This is an applicant statement that a challenger would use affirmatively to show the O‑ring features were known and obvious.

5.3 Second collapsible band (claims 9, 14)

Down itself discloses plural, parallel collapsing features: U.S. 5,466,173 describes "an intermediate member 150 … outer surface 157 … with parallel circumferential compression grooves 158 formed therein," each groove having surfaces 165/167 sloping inward to a central joint 168, collapsing simultaneously under axial load. Multiple bands for greater gripping force is thus not merely obvious, it is disclosed. Claims 9/14 are the clearest candidates for invalidity.

5.4 Hexagonal wrench facets (claims 10, 15)

• Tele‑Communications U.S. 4,755,152: flange 36 "provided with a plurality of flat surfaces 38 for facilitating rotation of the fastening means 26."
• Szegda U.S. 4,990,106: exterior ribs "deformable into a hexagonal configuration"; Down's '173: "a raised portion … acts as a gripping portion for a conventional spanner."
• Hex flats on a coupling nut are the archetype of a § 103 design choice.

6. Ground summary

Predicted outcome if litigated today: claims 9, 14 (disclosed in Down '173), 10, 15 (flats), and 8, 13 (O‑rings, given Down '076's own O‑ring 105 and the § 102(e) art) are the weakest and most likely invalid; claims 7, 12 are close behind (U.S. 4,755,152 is nearly on point); claims 1–6 and 11 depend on whether the trier treats "full‑thickness corrugation + stress‑relief undercuts" as a mere design choice over Down's surface groove (my view: yes, but this is the only genuinely contestable ground).

7. Counterarguments and secondary considerations

8. Caveats and unresolved items

• Reference text sourced from secondary copies. I verified the key passages of Down '076 and '173, Szegda, and Tele‑Communications '152 from Google Patents, FPO, and Justia pages quoted in this session; I did not page‑check the original U.S. 5,525,076 / 5,466,173 printed specifications. The two Down documents are continuations/related disclosures with overlapping figure numbering — I have attributed O‑ring 105 to the '076 FIG. 7 embodiment and O‑rings 145/147 to the '173 disclosure as reported on those pages, and flag that a page‑verified copy should be used before these citations are relied on in a filing.
• Prior "Discrepancy flag" resolved. The earlier section flagged an IPWatchdog reference to "U.S. Patent No. 5,466,173 … to William Down." U.S. 5,466,173 is a real patent (William J. Down, Gilbert Engineering, "Longitudinally compressible coaxial cable connector," issued Nov. 14, 1995 — listed in Justia's and other connector patents' "References Cited"). It was therefore not a source typo; it is a second Down connector patent whose disclosure is materially more damaging than '076 alone (parallel grooves; O‑rings). This changes the obviousness picture from the earlier sections.
• U.S. 5,975,951 / WO 99/65117 appears on this page only in the "Similar Documents" table, not in the examiner's citation list. I have used it because it appears on the same page and because its June 8, 1998 priority precedes the '422 filing date; a § 102(e) challenge would require confirming the U.S. filing date and disclosure support (I have not retrieved the US 5,975,951 front page directly).
• PTAB usage (unverified). A USPTO PTAB petition excerpt surfaced in search results cites "Youtsey (EX1007)" and "Tarrant (EX1010)" as prior art in a later IPR concerning conductive O‑rings, and discusses "Youtsey's non‑conductive sealing o‑rings 82, 84" retaining connector parts. That indicates the '422 disclosure has itself been relied on as prior art. I could not confirm which Youtsey patent is EX1007, so I do not rely on it.
• No post‑grant challenge to the '422 was located (consistent with the prior Litigation section), so there is no PTAB claim‑construction or institution decision to cite on the scope of "collapsible band."