US 230090

I'll run a few targeted searches for this identifier before summarizing.

Let me check for litigation/docket records and the official USPTO record.

Search status (important caveat first)

I ran targeted searches for the exact identifier 230090 against USPTO-facing and CAFC-facing sources, including a direct query for a CAFC 2026 docket involving patent 230090.

• CAFC 2026 dockets: no hit. My searches returned no 2026 Federal Circuit docket, opinion, or Rule 36 judgment referencing US 230,090. This is expected, not merely a search failure: the record shows the patent's anticipated expiration as 1897‑07‑13 (17 years from the 1880 grant), and its legal status is listed as "Expired – Lifetime." A patent that expired in 1897 cannot be the live patent-in-suit in a 2026 appeal. I have no authoritative CAFC 2026 record to report.
• USPTO record: I could not retrieve a live USPTO PatentCenter/Assignment entry in these searches. I am therefore relying on the full patent text supplied in the prompt (sourced from https://patents.google.com/patent/US230090/en), which is the authoritative document here.
• False positives to discard: A search on the bare string "230090" also returned a Bukowskis auction lot number 230090 (Francis Seymour Haden etchings) and unrelated patents (e.g., US 2,198,841, which merely has application Serial No. 294,300). None of these are US 230,090. Per the operating rule, I am not auto-correcting any of these numbers — I am simply excluding them as different identifiers.

US Patent 230,090 — Summary

Abstract

There is no formal abstract — abstracts were not part of US patent practice in 1880, and none appears in the document.

The de facto statement of the invention (the passage Google Patents surfaces as its "Definitions" summary) reads:

"My invention has reference to tips for flexible electric conductors; and it has for its object to furnish a device of that class affording increased facility for attaching the conductor thereto, and which admits of the ready separation of the tip from the conductor when desired."

In plain terms: the invention is a reusable soldered tip/ferrule for a flexible (stranded, fabric- or core-based) electric conductor, where the joint is made with soft solder rather than by crimping or compressing the shell, so that reheating the tip in a flame melts the solder and lets the tip be pulled off, salvaged, and reattached to a new length of conductor.

Disclosed structure (specification, not all claimed):

• A — a sheet-metal shell or ferrule, spun or struck up, with a hole in its tip end.
• B — a common headed escutcheon nail or tack, thrust through that hole from outside.
• C — the flexible conductor; D its core; E the metallic (wound) conductor about the core.
• F — soft solder laid on the tack head as a small piece; preferably in the form of small globules or "shot," which permit the core to be brought into actual contact with the pin-head (stated as preferred but "not absolutely essential").
• Process: tack through shell → solder on tack head → bare core pushed in until it abuts the pin head → hold tip in a flame → solder melts, uniting tack to shell and, by flowing onto metallic conductor E, "setting up electric connection beyond peradventure."
• Separability: reheat in a flame, draw the core out of the shell, and secure new wire sections in place as before.

Stated prior art / problem: prior tips were a sheet-metal shell with a ring-headed pin thrust through it, the conductor core attached to the ring, and the shell then crimped or compressed. The objection stated is that on conductor breakage the tip must be discarded, because the crimped parts cannot be separated for reuse.

Figures: Fig. 1 — side view; Fig. 2 — central sectional view on an enlarged scale showing internal construction.

Claims — plain-language overview

The patent has two claims, both in the old single-sentence "as set forth" form. Neither claim 2 depends from claim 1, so both claims are independent; claim 2 is the narrower combination claim.

Claim 1 (independent — soldered conductor-to-tip joint):

"A flexible electric conductor united to its tip by solder, which secures together the terminal shell and separate tip, as set forth."

Plain language: A flexible electric conductor joined to its tip by solder, where the solder is what holds the terminal shell and the separate tip together. The novelty lies in the solder joint as the fastening means — a two-part (shell + separate tip) assembly united by solder, rather than the prior crimped/compressed assembly. Note that the recitation covers the assembled combination of conductor + shell + separate tip + solder bond; it is not a claim to the tip alone as an article.

Claim 2 (independent — specific four-element combination):

"The combination, with the shell A, of the tack B, solder F, and flexible conductor C, substantially as set forth."

Plain language: The particular combination of (A) the sheet-metal shell/ferrule, (B) the headed escutcheon nail/tack passing through the shell's tip hole, (F) the solder, and (C) the flexible conductor — arranged and united substantially as described. This is a narrower, structurally specific claim tied to the illustrated parts.

Notable claim-scope observations

• Claimed: the solder-united shell + separate tip arrangement; and the shell/tack/solder/conductor combination.
• Disclosed but NOT claimed: the reusability/removability function (the stated object of the invention), the hole in the shell tip, the globule/"shot" form of solder, and the specific method steps (flame heating, drawing the core out, reattaching new wire). Under 1880 claim practice, these unclaimed features were available only as specification disclosure and would not have supported infringement.
• Because both claims are apparatus/combination claims, there is no method claim in this patent.

Explicit uncertainty disclosures

1. Assignee: I have no authoritative information. The printed patent names only the inventor; Google Patents lists no assignee. Any assignment, if it existed, is not reflected in the sources I could retrieve.
2. Inventor name variant: The specification heading prints "J. HENRY O. WATTS, OF BALTIMORE, MARYLAND," and the signature line reads "J. HENRYO. WATTS." OCR in the source page also renders it once as "J. HENRY G. WATTS." Per the strict rule I am not auto-correcting these; I report them as printed. Separately, an independent scholarly source on Baltimore telephone history refers to a Baltimore telegrapher "John H. C. Watts" of the firm Davis & Watts. I flag that as a possible identity match only — I cannot confirm that this is the same person, and the patent's own text does not establish it.
3. A "Watts patent" in litigation is a different invention: My searches surfaced Davis v. Chesapeake & Potomac Tel. Co. (77 F. 895), which litigates a "Watts" switch-board pin patent having a resilient tongue pivoted on the tip. That subject matter (switch-board pin retention/contact) is entirely different from US 230,090 (a soldered conductor tip). I could not confirm the patent number asserted in that case, so I make no assertion that it is or is not US 230,090 — I flag it only to prevent conflation. Do not treat that case as a record of US 230,090.
4. CAFC 2026: As stated, no 2026 CAFC docket exists for this patent to my knowledge or in my searches, and none is legally plausible given the 1897 expiration.
5. Procedural caution: Old patent records frequently have OCR artifacts in names, dates, and claim text. Where the prompt's authoritative full text and my search results disagreed, I followed the full patent text per the operating rules; where the text itself is internally inconsistent (the inventor's name), I have preserved the inconsistency rather than resolving it.

I'll search for litigation involving US patent 230090 across the requested sources.

Let me run additional targeted searches across litigation databases.

Litigation Search Report — U.S. Patent No. 230,090

Bottom line

No litigation involving U.S. Patent No. 230,090 has been identified. I found no district court action, Federal Circuit (CAFC) appeal, ITC investigation, PTAB proceeding, or Unified Patents litigation-entry naming this patent as an asserted or challenged patent.

Why the negative result is expected (and not merely a search failure)

• The patent is a single-claim-set, 19th-century patent. US 230,090, "Tip for Electric Conductors," issued July 13, 1880 to J. Henry O. Watts of Baltimore, Maryland (application filed May 26, 1880). Per the Google Patents record, its term expired July 13, 1897 (17-year term), status "Expired – Lifetime."
• The databases you directed me to cannot cover the relevant period. PACER's earliest electronic district-court dockets begin in the late 1980s–1990s; the Unified Patents litigation and PTAB portals, Docket Navigator, Lex Machina, and CAFC opinions databases likewise cover the modern era. A 19th-century infringement suit would appear only in print reporters (Federal Reporter, the Official Gazette, circuit/CCPA reports) or historical compilations, not in any of the requested sources.
• A search of the modern litigation trackers returns nothing for "230090" as a patent number. Searches for "US230090" and for the patent number in combination with litigation/PACER/CAFC/Unified Patents portal terms returned either zero results or unrelated hits.

Case list

Near-misses I deliberately excluded (different patents, do not conflate)

Because your instruction is to interpret identifiers literally and not to return similar numbers, I want to flag three "Watts" and "23009x" results that surfaced and were rejected:

1. Davis v. Chesapeake & Potomac Telephone Co., 77 F. 895 (C.C.E.D. Va. 1896) — an infringement suit on a Watts patent claiming a switch pin with a resilient tongue pivoted in a longitudinally slotted tip. The quoted specification and claims ("A switch pin having a resilient tongue pivoted within or upon its tip") are for a switchboard pin, not the shell/tack/solder tip of US 230,090, whose claims read "A flexible electric conductor united to its tip by solder…" and "The combination, with the shell A, of the tack B, solder F, and flexible conductor [C]." Different patent.
2. AMP Inc. v. Burndy Corp., 215 F. Supp. 3 (D. Del. 1963) — involves a Watts patent directed to a crimp ferrule with a plastic sleeve exhibiting "resistance to cold plastic flow" (a 20th-century patent), not US 230,090.
3. WO 2020/230090 A1 (PCT/IB2020/054592, ferrous sulphate granules) and DIS 23009-1 (an ISO/IEC MPEG standard document cited in IPR2020-01688) — these merely contain the digit string "230090"/"23009" and are unrelated to the patent.

Secondary evidence consistent with no assertion history

The Google Patents "Cited By" table for US 230,090 lists only one forward citation (US 3,014,196, "Lamp base," Sylvania Electric Products, 1961). Forward citations of that kind come from prosecution citations, and the record shows no "cited by third party" entries of the type typically generated by litigation or IPR activity.

Caveats

• My conclusion is limited by which sources are searchable: I cannot rule out that an 1880s–1890s infringement suit on this patent exists in unindexed print sources. Watts's tip was a commercial telegraph/telephone article, and the Davis case above shows Watts-family patents were litigated in that era, so a historical suit is not impossible — I simply found no record of one for 230,090 specifically.
• I did not have access to a complete PACER docket sweep or a full Unified Patents case-list export; my queries returned no matching entries rather than an exhaustively verified absence.
• Nothing in this report should be treated as a legal conclusion about validity, enforceability, or the scope of any claim.

If you want, I can next attempt to trace the patent's assignment history through the USPTO Assignment database and search 19th-century Federal Reporter volumes for "Watts" + "tip" or "conductor" to see whether an 1880s–90s suit ever existed.

I'll verify the structured-data default against live sources before writing.

Proceedings overview

Total AIA trial proceedings on US 230,090: zero (0) — no active proceedings, no claims invalidated, no claims sustained, no settlements, no institution denials. The USPTO Open Data Portal structured block returned no IPR, PGR, or CBM entries for this patent, and my independent web searches (PTAB E2E/PTACTS document corpus, PTAB decision text, docket aggregators, CAFC/CourtListener-adjacent results) surfaced no petition, institution decision, Final Written Decision, or appeal naming US 230,090. Defensive posture: this is not a "hardened patent" scenario — it is a dead-patent scenario. US 230,090 issued 1880-07-13 and expired 1897-07-13, so no IPR challenge was ever needed and none was ever filed. Any demand letter citing this patent number is citing a patent that has been unenforceable for 129 years.

No proceedings to report

The requested per-proceeding template (##### {PROCEEDING_NUMBER} — {Petitioner} v. {Patent Owner}) cannot be populated without fabricating proceeding numbers, which I will not do. Per the operating rules, I am reporting the absence rather than inventing identifiers.

The structured PTAB block is authoritative here, and it is corroborated by three independent signals:

1. The patent's own publication record. Google Patents shows exactly one forward citation for US 230,090 — US 3,014,196 ("Lamp base," Sylvania Electric Products, 1961), an examiner/prosecution citation. There are no "cited by third party" entries, the category that typically accumulates when a patent is swept into IPR or litigation-adjacent activity. Source: https://patents.google.com/patent/[US230090](/patent/US230090)/en
2. No reissue or reexamination trail on the face of the record, which is the 19th-/20th-century analogue of post-grant challenge activity. None appears.
3. The "23009" hits are false positives — see the conflation warning below.

Why AIA trials were never available against this patent

This is not a search-coverage gap; it is a statutory availability analysis, and it is a stronger answer than mere absence of records.

So the only theoretically filable AIA trial was an IPR, and it was economically and legally pointless from the moment the patent lapsed. That explains the empty docket without resorting to "the databases don't go back that far."

Conflation warning — do not treat these as proceedings on 230,090

Consistent with the previously generated litigation section, my searches for "230090" in the PTAB corpus returned exactly one digit-string collision, which I am explicitly rejecting:

• IPR2020-01688, Unified Patents, LLC v. .... (FWD finding claims of US 10,270,830 B2 unpatentable over the combination of DIS 23009-1 and M20060). "DIS 23009-1" is an ISO/IEC MPEG standard document (Dynamic Adaptive Streaming over HTTP), not a patent number, and certainly not US 230,090. The Board opinion is public via PTACTS: https://ptacts.uspto.gov/ptacts/public-informations/petitions/[1541802](/patent/1541802)/download-documents
• WO 2020/230090 A1 (PCT/IB2020/054592, ferrous sulphate granules) — a publication number containing the string "230090," unrelated.

Neither is a proceeding on US 230,090. Flagging this because a keyword search for "230090" will surface both, and citing either as "PTAB activity on the '090 patent" would be a substantive error.

Strategic summary

Claim status. US 230,090 has two claims, both UNTESTED in any AIA trial and both long expired. Claim 1: "A flexible electric conductor united to its tip by solder, which secures together the terminal shell and separate tip, as set forth." Claim 2: "The combination, with the shell A, of the tack B, solder F, and flexible conductor [C], substantially as set forth." Because no IPR, PGR, or CBM was ever filed, there are no canceled claims, no surviving-as-amended claims, and no substitute claims. The claims were never narrowed by the PTAB — they simply ran their 17-year term and lapsed on 1897-07-13. In a modern assertion context, that distinction does not matter: an expired claim cannot be infringed, full stop.

Estoppel landscape. There is no § 315(e)(2) estoppel on this patent, because there is no petitioner. No party is barred from raising any ground. This is academic for invalidity purposes (the patent is expired), but it matters for a different reason: if a current demand letter cites US 230,090, the recipient is not facing an estoppel-limited defense posture — the recipient is facing an expired patent, which is an affirmative, complete answer that requires no PTAB history at all. Practical defenses to raise instead of IPR: patent expiration (35 U.S.C. § 271 requires an unexpired patent); § 286's six-year damages bar for any historical conduct; laches/equitable estoppel and statute-of-limitations arguments; and the antecedent question whether the letter's own identification of the patent number is even correct.

Pattern signals. There are none to read. No repeat petitioner, no serial IPR filings (impossible for a patent of this vintage), no PTAB appeal history, no defensive aggregator involvement (Unified Patents did not exist until 2012 and could not have filed against an 1897-expired patent — the only Unified appearance in the search results is the unrelated IPR2020-01688). For a patent of this age, the historically relevant post-issuance challenge mechanisms were interference proceedings, ex parte reexamination, and reissue — and the record shows no evidence of those either.

Recommended next steps

• If you are a defendant or recipient of a demand letter citing US 230,090: there is no FWD to link, because there was never a proceeding. The dispositive documents are instead (a) the Google Patents record showing issuance 1880-07-13 and anticipated expiration 1897-07-13, https://patents.google.com/patent/US230090/en, and (b) the two-claim specification text itself. A letter asserting this patent is facially baseless — an expired patent has no exclusionary rights — and may raise separate issues (e.g., Rule 11 exposure under Fed. R. Civ. P. 11 if a suit is actually filed, and potential state-law/UCL theories depending on jurisdiction).
• Do not file an IPR. It would be futile: no pre-issuance prior art is needed, no live controversy exists, and the costs (attorney fees, expert retention, petition fees) buy nothing. There is no claim to cancel.
• If the citation turns out to be a typo or a family-number confusion: the most plausible confusions are WO 2020/230090 A1 (unrelated PCT application) or DIS 23009-1 (an MPEG standard, not a patent). Ask the asserting party to identify the patent by full number, title, and issue date; US 230,090's title is "Tip for electric conductors" and its sole named inventor is J. Henry O. Watts of Baltimore, Maryland — a mismatch against any modern assertion would confirm a citation error rather than a live patent.
• If you are researching this patent for historical or defensive-publication reasons: the correct conclusion is that the patent contributed its disclosure to the public domain in 1897. The specification, including the shell A / tack B / solder F / flexible conductor C arrangement and its claims, is fully available as prior art with a 1880-07-13 issue date and a 1880-05-26 filing date — useful as a printed publication reference against later patents, and indeed the record shows it was cited forward once (US 3,014,196, Sylvania, 1961).

Caveats. I could not run a line-by-line export of the full PTAB E2E docket for every calendar year, nor a complete Unified Patents PTAB case-list export; my conclusion rests on the authoritative ODP structured block (zero entries) plus corroborating searches that returned no matching proceeding. Given the statutory unavailability analysis above, I have high confidence in the zero result. Nothing here is a legal conclusion on validity, enforceability, or claim scope, and I flag no contradiction with the previously generated litigation section — the two sections are consistent, including on the DIS 23009-1 and WO 2020/230090 false positives.

I'll run targeted searches against the USPTO assignment-facing sources and the cross-reference directories before reconstructing the chain.

Inventors

Single-inventor patent. There is exactly one named inventor, so the classic "all inventors departed the assignee within 12 months" fire-sale precursor is structurally inapplicable here — there is no co-inventor group whose departure could be tracked, and there is no named corporate assignee for anyone to depart from.

Employer — explicitly uncertain. The only lead is the independent scholarly source on Baltimore telephone history already flagged in the earlier section of this analysis: a Spanish-language article on Davis & Watts (La aventura empresarial en Europa de un pionero de la telefonía en Baltimore, Universitat de Barcelona) describes "John H. C. Watts," a telegrapher who came from the American District Telegraph of Baltimore, co-founded Watts & Company in 1871 and then Davis & Watts Company of Baltimore City in 1875 with Augustus G. Davis. That is plausibly the same man, but the patent prints "J. Henry O.", not "John H. C." I am not auto-correcting this, and I make no assertion of identity. Per the earlier sections' cross-reference, this remains a possible match only. I have found no employment record (Bell licensee, telegraph company, or otherwise) that establishes Watts's employer as of the May 26, 1880 filing date.

Original assignee

None named on the issued patent.

• The document is granted in the inventor's own name. The heading reads only "J. HENRY O. WATTS, OF BALTIMORE, MARYLAND" — there is no "assignor to" clause, which is the form that would appear on an 1880 patent face had a pre-issue assignment been recorded.
• Google Patents lists no assignee for US 230,090, and the patent's own Legal Events entry contains no assignment event (see next section).
• Therefore the original assignee is the inventor himself — sole ownership as of the July 13, 1880 grant.

Products / line of business. Not established in the record. The specification describes a commercial article (a solder-jointed reusable ferrule or "tip" for flexible conductors, intended for the telegraph/telephone apparatus trade of the period), and the claimed structure is plainly a manufactured good rather than a laboratory curiosity — but whether any entity shipped a product embodying claims 1–2 is not something I can substantiate. The patent text contains no manufacture, sale, or licensee recital.

Current status. Not a corporate entity, so the operating / acquired / dissolved / bankrupt categories do not apply to the patent owner. The inventor's later business history — including whether Davis & Watts or Maryland Telephone Company absorbed or succeeded to any personal assets — is not confirmable from the sources I can reach, and I make no claim about it.

Assignment timeline

The USPTO Assignment Center has no retrievable records for this patent. I am stopping after this section, as instructed.

No recorded assignment is listed for US 230,090 in the sources I searched:

Why there are no records — and the limits of that negative:

1. The Assignment Search database does not reach back far enough. Per USPTO's own materials, the database "contains all recorded Patent Assignment information back to August 1980" (USPTO, What are Assignments? webinar deck: https://www.uspto.gov/sites/default/files/documents/Assignment%20Database%20Webinar_20150120.pdf). The data.gov harvest record for the Patent Assignment Search API (Version 1.4) states the same coverage window explicitly: temporal range 1980-08-01/2025-12-31 (https://catalog.data.gov/harvest_record/ba9ec748-f1de-4d6d-b9c3-b1d839277c07/raw). A patent that issued in 1880 and expired in 1897 falls entirely outside the indexed window, so an "empty result" here is a coverage artifact, not proof that no assignment ever existed.
2. Google Patents Legal Events shows no assignment. The authoritative full text supplied for this patent lists only: Application granted (1880-07-13), Publication of US230090A (1880-07-13), Anticipated expiration (1897-07-13), Status "Expired – Lifetime." There is no Assignment, Change of Name, Merger, Security Agreement, License, or Release event of any kind.
3. No reel/frame, correspondent, execution date, or recording date exists to capture. I found no assignor, assignee, or attorney-of-record entries to report. Because there is no correspondent, signals 1, 3 and 4 below have no evidentiary hooks in this chain.
4. Pre-1980 assignments are not reachable online. Nineteenth-century conveyances were recorded in the Office's lettered Liber volumes, not in reel/frame form. Any 1880s assignment would have to be obtained by a manual records request to the USPTO Assignment Recordation Branch / OPR, or by searching the Official Gazette and Federal Reporter volumes of the period — none of which is indexed in Assignment Center, RPX, or Unified Patents portals.

Consistency check with the earlier sections: this is consistent with — not contradictory to — the previously generated Patent summary, which reported "Assignee: None stated" and "I could not retrieve a live USPTO PatentCenter/Assignment entry." No conflict to flag. Note the earlier sections also correctly excluded Davis v. Chesapeake & Potomac Telephone Co., 77 F. 895 (C.C.E.D. Va. 1896) as concerning a different Watts patent (a switch-board pin with a resilient pivoted tongue) — so that case supplies no assignment or chain-of-title evidence for US 230,090.

Where this leaves the remaining requested sections

Because the constraint for this task is explicit — "If the Assignment Center has no records for this patent, say so plainly and stop after this section" — I am not populating the Timeline diagram, the eight NPE/troll-pattern signals, or the Verdict, rather than filling them with inference. The status of the tracking job is captured by one category: Insufficient data (no records beyond the original issuance; no post-issuance assignment of record reachable in any indexed source).

Verification link: https://assignmentcenter.uspto.gov/ (Assignment Search, launched 2025-09-27, replacing Patent Assignment Search and Assignments on the Web) — search by patent number 230090.

Recommended next steps if you want to push further: (a) manual records request to the USPTO Assignment Recordation Branch for pre-August-1980 Liber-volume conveyances indexed to patent 230,090; (b) a printed Official Gazette sweep for 1880–1897 under "Watts" for any recorded transfer or license; (c) confirmation of whether the inventor is the "John H. C. Watts" of Davis & Watts, which would establish the commercial entity that most plausibly would have taken an assignment had one been made.

I'll run targeted searches against USPTO-facing sources and the cited references.

I'll ground this analysis in the actual prior-art section of the US 230,090 page, starting with the pre-1880 references.

Now let me check the other pre-1880 reference in the list and the general-knowledge anchors.

Let me verify the 1860 reference and the state of the soldering art.

Obviousness Analysis — U.S. Patent No. 230,090

"Tip for Electric Conductors" — J. Henry O. Watts, filed May 26, 1880, issued July 13, 1880

1. Threshold: what on this page actually qualifies as prior art

The Google Patents page for US230090 presents three bodies of material under its prior-art heading. Only some of it is usable as § 102/§ 103 art against a May 26, 1880 filing date (pre-AIA; no earlier priority is claimed — the specification says only "Application filed May 26, 1880").

Consequence: on this record the obviousness case must be built from (a) Nickerson US 203,931, (b) the crimped shell-and-pin tip admitted in the US230,090 specification, and (c) the ordinary knowledge of the art (soft soldering; "common headed escutcheon nail or tack" — the patent's own words).

2. Framework and the hypothetical PHOSITA

• Governing test: Graham v. John Deere Co., 383 U.S. 1 (1966) (scope/content of art; differences; PHOSITA level; secondary considerations), as refined by KSR Int'l Co. v. Teleflex Inc., 550 U.S. 398 (2007) (predictable use of prior-art elements; "obvious to try"; known technique applied to a known device).
• Anachronism caveat (flagged, not waived): § 103 did not exist when this patent issued or expired; it was enacted by the Patent Act of 1952 and the patent expired July 13, 1897. Contemporaneously the bar was the judge-made "invention" requirement of Hotchkiss v. Greenwood, 52 U.S. (11 How.) 248 (1850) — substituting a known material or known equivalent element without a new function is "the work of the skilful mechanic, not that of the inventor." Any modern § 103 conclusion must be understood as hypothetical and retrospective; it is easier to invalidate under KSR than it would have been in 1880 under Hotchkiss.
• PHOSITA (as of May 26, 1880): a telegraph/telephone electrician or instrument-maker who routinely joins flexible, core-and-wound-strand conductors to terminal tips; comfortable with sheet-metal spinning/striking, with soft (lead-tin) solder and a flame or soldering copper, and with the crimped/pressed ferrule then standard in the art. He is presumed to know the entire body of electrical-connection art (In re Winslow / KSR).

3. Claim elements and the mapping

4. Ground A — Claim 1 obvious over Nickerson US 203,931 in view of the admitted crimped shell-and-pin tip and the ordinary soft-soldering art

4a. What Nickerson discloses

Joseph A. Nickerson (Boston), US 203,931, patented May 21, 1878 (filed April 20, 1878) — two years before Watts. Source: https://patents.google.com/patent/[US203931A](/patent/US203931A)/en (PDF: https://patentimages.storage.googleapis.com/e6/50/9d/25ff7a7737c022/[US203931](/patent/US203931).pdf).

Nickerson teaches a connecting tip for the same class of flexible conductors in the same field (telephone and telegraph apparatus), and — critically — states the identical problem Watts states as his object:

"…by which arrangement a wire can be inserted or removed and replaced within the tip without loss of time, without the need of a skilled workman, and without the need of a new tip, as is now the case with the ordinary tips used on telephones and other electrical instruments or apparatus."

Watts's own object statement is the same: a tip "which admits of the ready separation of the tip from the conductor when desired," because in the old crimped tip "the tip must be thrown away and a new one attached."

Nickerson also discloses the shell + separate outer part architecture (split sleeve b with slits b′, screw-threaded shank c, head d, projection e, plus a separate annular tapering sleeve f–g screwed around it), a hole/opening-based assembly, and hand-grippable serrated heads for attaching and detaching. It even rounds the outer end f′ "to prevent the wire from breaking in the manipulation of it."

The only element of claim 1 Nickerson lacks is solder as the uniting means. Nickerson compresses by screw-clamping; Watts solders.

4b. What the admitted art adds

The admitted prior tip supplies the rest of the claim-1 structure — a terminal shell and a separate tip element passed through the shell — with the difference that the pin has a ring head and retention is by crimping.

4c. Why the substitution would have been obvious

1. Same field, same problem, same purpose. Nickerson and the admitted tips are directed to connecting-tips for flexible telephone/telegraph conductors, aiming at detachability/reuse. KSR makes it obvious to apply "a known technique … to improve similar devices in the same way."
2. Soldering was notoriously old and routine in exactly this art. Soft lead-tin solder and the "hold the work in a flame" technique were elementary to an 1880 electrician; Watts himself introduces solder as a bare presumption of skill ("a small piece of soft solder, F, is laid upon the head of the tack"; "solder flowing upon the metallic core E sets up electric connection beyond peradventure"), without any teaching of composition, flux, or technique. Neither claim recites any solder parameter.
3. Reversibility is the known, inherent property of a solder joint. The stated advantage — heat to melt, pull apart, reuse — is not a newly discovered result of Watts's arrangement; it is the textbook behavior of any soft-soldered joint. Using a heat-reversible fastening where a permanent crimp caused a discarded part is the predictable-result case of KSR, not a new principle.
4. Two functions from one element. Solder simultaneously (i) locks the tack to the shell and (ii) wets the conductor to make electrical contact — the specification says as much. Consolidating two functions the prior art performed with two features (crimp for retention, metal-to-metal contact for conduction) is a classic obvious design choice.
5. No teaching away. Nothing in the verified art disparages soldering; the crimp art simply chose a different retention mechanism. Competing known solutions to one problem is a reason to combine, not a barrier.

4d. Result

Claim 1 ("A flexible electric conductor united to its tip by solder, which secures together the terminal shell and separate tip") is, on this record, more likely than not obvious under KSR over Nickerson + the admitted crimped shell-and-pin tip + ordinary skill in soft soldering.

5. Ground B — Claim 2 obvious over the same combination, with escutcheon tacks as a known fastening article

Claim 2 recites "the combination, with the shell A, of the tack B, solder F, and flexible conductor C, substantially as set forth."

Why obvious: swapping a ring-headed pin for a headed tack/pin in a shell is a substitution of one known equivalent fastening element for another with no change in the way the device works — precisely the Hotchkiss situation (and equally unpatentable under KSR's "predictable variation"). Claim 2 adds no structure beyond the admitted art plus a stock hardware item plus old solder; its added specificity is the absence of invention, not evidence of it. Note also that the globule/"shot" form of solder and the flame-heating steps — the only genuinely particularized details Watts describes — are unclaimed (they appear in the specification as "by preference" and "not absolutely essential"), so they cannot rescue either claim.

Result: Claim 2 is also more likely than not obvious for substantially the same reasons, with the tack substitution supplying the motivation element.

6. Compact ground summary

No anticipation ground is established on this record: I found no verified pre-1880 reference that discloses or suggests uniting the shell and the separate tip by solder. Obviousness, not anticipation, is the operative theory.

7. Counterarguments and how they fare

For nonobviousness (patentee's side):

• No reference discloses the solder joint as the fastening means. True, and it is the strongest point. But under KSR a missing express teaching is not controlling where the technique was known and its application predictable.
• The old tips used a ring on the pin because the conductor core was attached to the ring; the tack's head is what makes soldering work. This is the best technical argument, but the patent itself calls the tack a "common" article and gives no head geometry — it collapses to "use a flat head instead of a ring as the solder seat," a shape choice with no asserted new result.
• Soldering might be weaker than crimping, so the art arguably preferred crimps → teaching away. Speculative on this record. I found no reference disparaging soldered cable tips, and Watts asserts "greater strength of attachment" from his own construction.
• Secondary considerations. No evidence of commercial success, licensing, copying, or long-felt-but-unsolved need is present in the sources available. Nickerson is a mixed fact: his 1878 patent shows the problem was known and that others solved it by a different route — which supports motivation more than nonobviousness.

Net: the defense is tenable only on the "no reference teaches the soldered tip" line, and it must contend with KSR's predictable-result and known-technique rationales.

The biggest single vulnerability is breadth, not combination: claim 1 is a bare functional-combination claim ("conductor united to its tip by solder … securing together the terminal shell and separate tip"). Read plainly, it is close to reading on any soldered two-part conductor tip, which invites either a § 102 attack from unlisted 19th-century art or a § 112-style indefiniteness/setting-forth objection under then-current practice ("as set forth" claim form). This is an exposure the earlier sections did not address.

8. Bottom line and explicit uncertainties

• Likely outcome (modern § 103): Claims 1 and 2 would likely be held obvious over US 203,931 (Nickerson, May 21, 1878) in view of the crimped shell-and-pin tip admitted in the US230,090 specification and the ordinary skill in soft soldering of the time; claim 2 additionally fails for the "common headed escutcheon nail or tack" substitution.
• Historically: validity would have been assessed under Hotchkiss's higher "invention" bar and without § 103, so a contemporaneous holding is not reliably predictable from this analysis.

Uncertainties I will not paper over:

1. US 30,048 A (1860, "cooper") — its subject matter is unverified; my searches returned only a false positive (serial No. 30,048 → US 2,162,229). I assert nothing about it and build no ground on it.
2. No pre-1880 reference expressly soldering a tip to a shell was located. If one exists (e.g., in unindexed 1860s–70s telegraph-tip art), it could convert the theory from obviousness to anticipation of claim 1.
3. All other "Similar Documents" and the sole "Cited By" reference post-date 1880 and are excluded as prior art; I have not relied on them, including US 317,887 A ("Flexible tip for conducting cords," 1885), which is later art despite its topical closeness.
4. Pre-1952 claims, 19th-century OCR, and the variable inventor name are inherited caveats from the earlier sections and are unaffected by this analysis.
5. Nothing here is a legal conclusion on validity, enforceability, or claim scope.