US 8474756

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

Let me check for any litigation or CAFC docket activity involving this patent.

US 8,474,756 B2 — Search Report

Important scope caveat up front. I do not have direct query access to USPTO Patent Center/PAIR, the USPTO assignment API, or CAFC/PACER dockets. My searches surfaced (a) the Google Patents record, which mirrors the USPTO front-page bibliographic data, and (b) general 2026 Federal Circuit docket notices. I found no CAFC 2026 docket, PTAB proceeding, ITC investigation, or district court case naming US 8,474,756. That is a negative search result, not affirmative proof of absence — a PACER/PTAB docket search would be needed to be certain. The bibliographic data below is taken from the authoritative full patent text supplied to me, not from a live USPTO query.

Bibliographic data (US 8,474,756 B2)

Legal status. "Expired – Fee Related." Maintenance fees were paid at 4 years (2016) and 8 years (2020), but the record shows a lapse: maintenance-fee reminder mailed 2025-02-17, and on 2025-08-04 the patent expired for failure to pay maintenance fees under 37 CFR 1.362, effective 2025-07-02. The listed "adjusted expiration" of 2032-04-13 reflects the nominal term had fees been paid. Treat status as expired/unenforceable.

Abstract (verbatim)

"This system makes it possible to join a substantially flat base of an element to be fixed to a top plate. It is provided with: at least one hole of elongated shape made in the top plate, a shaft extending substantially perpendicular to the base of the element to be fixed and mounted movable in rotation relative to its longitudinal axis, a fixation head of elongated shape matched to the shape of the hole made in the top plate and disposed on a first side of the base of the element to be fixed, control means for making the shaft pivot around its axis and disposed, relative to the fixation head, on the other side of the base of the element to be fixed."

Plain-language overview of the independent claims

The patent has three independent claims: 1, 12, and 13 (13 claims total; claims 2–11 are dependent).

Claim 1 — the fixation system itself (mechanical core).
A quarter-turn "keyhole"-style fastener for joining a flat base (e.g., a seat leg) to a top plate (e.g., a seat rail). A shaft passes perpendicularly through the base and can rotate about its own long axis. On the underside of the base is a fixation head, integral with the shaft, shaped as an elongated oval whose outline substantially matches the elongated hole in the top plate — so it can pass through the hole in one orientation and, after a 90° turn, cannot be pulled back out. On the opposite (upper) side of the base sits the control means (e.g., a lever) used to turn the shaft. The claim's final "wherein" clause requires that a top surface of the fixation head is substantially planar and engages a substantially planar engaging surface of the top plate when the component is installed in an aircraft. That clause reads like prosecution-added language narrowing the claim relative to the as-filed disclosure, and is the most likely point of invalidity/infringence dispute.

Claim 12 — the seat/top-plate assembly.
An assembly comprising at least one aircraft seat, a fixation top plate, and a fixation system. The top plate must have a set of aligned elongated holes at a predetermined pitch (the spec describes a regular pitch, e.g., 2.54 cm / one inch), and the fixation system must be one according to claims 1–2.

Claim 13 — the aircraft.
A passenger aircraft having a cabin with seats fixed to the cabin floor, wherein at least one seat is fixed by at least one fixation system according to claims 1–2.

Note the literal dependency: claims 12 and 13 each recite "one of claims 1 to 2," not the full claim set. I have not auto-corrected this.

Notable dependent claims (context for the electrical aspect)

• Claim 4–5: elastic means (e.g., a PLI-type preload-indicating washer, citing U.S. Pat. Nos. 3,323,403 / 3,867,865 / 4,333,220) preload the fixation head toward the base.
• Claim 6: the rail houses a first electrical wire; the shaft is perforated to pass a second wire; connector means on the fixation head connect them — i.e., power/data is made simultaneously with the mechanical lock.
• Claims 7–8: two alternative connector implementations — an insulating board with a conductive land, or a rigid U-shaped contact projecting from the head.
• Claims 9–10: self-sealing coating on the conductor/contact.
• Claim 11: a protective cap covering base and lever, which can only be fitted when the lever is in the locked position (a mechanical-lock verification feature).

Asserted prior art of record (from the front page)

US 3,241,501; US 3,306,234; US 5,433,550; US 5,791,502; DE 10236076 A1; US 2005/0247820 A1; US 2005/0258676 A1; DE 102004039189 A1; US 7,455,276 B2; US 7,837,145 B2; US 8,251,623 B2. The specification also expressly distinguishes US 2005/0211836 A1 (aircraft seat-fixation with clamping arms and threaded locking), criticizing it for requiring multiple mounting steps and for lacking any simultaneous electrical connection.

Forward citations of note

US 9,663,232 B1 (AMI Industries, preloading track lock); US 11,084,108 B2 (Safran Seats USA, track fitting adaptor); US 11,584,259 B2 (Boeing, seat fittings); US 9,902,498 B2 (Airbus Operations GmbH); EP 4,613,646 A1 (Airbus Operations GmbH, rotatable lock fitting, 2024/2025) — the last being a recent Airbus filing that appears to continue this line of development.

Uncertainty flags

1. No CAFC 2026 docket confirmed. The only 2026 Federal Circuit material my searches returned was unrelated (e.g., V.O.S. Selections v. United States, No. 2026-1895; Contour IP Holding v. GoPro, No. 2026-2012; Wipqtus v. Samsung, No. 2025-1596). None mentions US 8,474,756.
2. No PTAB or ITC activity found for this patent number specifically. (My search surfaced unrelated PTAB papers referencing other patents, e.g., IPR2020-00915 on US 7,766,475 and IPR2025-00434 on US 10,379,301 — different patents.)
3. Assignee history is layered: initial assignment to "Airbus Operations," a 2010 corrective assignment to "Airbus Operations (S.A.S.)," and a 2011 merger record naming "Airbus Operations SAS" as successor to Airbus France (effective 2009-06-30). The Google Patents "current assignee" field lists Airbus Operations SAS.
4. I cannot verify a live USPTO Patent Center status screen. The expiration line above is taken from the legal-events data in the supplied record; confirm against Patent Center before relying on it.

I'll search for litigation involving US patent 8474756 across patent litigation tracking sites.

Let me run additional targeted searches on litigation databases.

Litigation Search Report — U.S. Patent No. 8,474,756

Patent under review: U.S. Patent No. 8,474,756 B2 ("System for fixing"), assignee Airbus Operations SAS, priority date October 14, 2008, granted July 2, 2013, application US 12/578,988.

Conclusion: No litigation found

Based on my searches, I could not identify any known litigation (district court, ITC, or Federal Circuit appeal) involving U.S. Patent No. 8,474,756. I found no case in which the '756 patent is asserted as a patent-in-suit, nor any declaratory judgment action, IPR, or other post-grant proceeding naming this patent.

Sources searched and what they showed

Important distinctions (to avoid a false positive)

My searches surfaced several Airbus patent disputes, but none involve the '756 patent:

• Airbus S.A.S. v. Firepass Corp., Nos. 2014-1792 et al. (Fed. Cir. 2015) — inter partes reexamination dispute over an unrelated patent.
• Kwikbolt Ltd v Airbus Operations Ltd [2021] EWHC 732 (IPEC) — UK action on blind fasteners; not the '756 patent.
• Bell Helicopter Textron v. Eurocopter/Airbus (D.D.C.) — U.S. Patent No. 5,860,621 (helicopter landing gear); not related.
• Various "847/’475" and "7,766,475" hits — different patents entirely (e.g., Jodi A. Schwendimann's U.S. Patent No. 7,766,475, which belongs to a different owner/technology). These are examples of similar-number confusion and should not be attributed to the '756 patent.

Caveats / confidence level

• Confidence: moderate-to-high that no litigation exists, but not absolute. My searches rely on publicly indexed litigation databases (Google Patents, CourtListener/RECAP, Unified Patents). Litigation settled very early, filed in a court whose docket is not fully captured by these aggregators, or conducted outside the U.S. could fall outside my visibility.
• A definitive negative is best confirmed via PACER (which requires paid/authenticated access) and Lex Machina / Docket Navigator (commercial), which I could not query directly here. I recommend a PACER "party search" for "Airbus Operations" as assignee/patent owner, and a Docket Navigator patent search on Patent No. 8,474,756, to certify the negative.
• For completeness, I also note the '756 patent's status is Expired – Fee Related (maintenance fee lapse effective July 2, 2025), which further reduces any likelihood of active enforcement today.

Bottom line: On the record available to me as of today, there is no known litigation involving U.S. Patent No. 8,474,756.

I'll verify the structured "no proceedings" signal against public sources before drafting.

Let me run a few more targeted checks to be thorough.

One more diligence pass on the PTAB-specific aggregators.

Proceedings overview

Zero. As of the most recent USPTO Open Data Portal (ODP) ingest, there are no AIA trial proceedings — no IPR, no PGR, no CBM — on file against US 8,474,756. The structured block is canonical and reports no proceedings; my independent web sweeps (Google Patents litigation/proceeding metadata, PTAB petition and decision text, PTAB E2E-adjacent sources, and Federal Circuit reporting) surfaced no petition naming this patent, no institution decision, no FWD, and no CAFC appeal. I did not find a single proceeding number to report, and I will not invent one.

The defensive posture this gives a defendant is unusual: there is no PTAB record to work from at all — the patent is not "hardened" by surviving IPRs (it was never tested), and it is not "weakened" by a cancellation (no claims were ever canceled). Any pre-litigation demand letter citing claims 1–13 is citing a set of claims that no adjudicative body has ever construed, instituted on, or invalidated. The most consequential fact in the file is not a PTAB result but a maintenance-fee lapse (see below), which moots most of the usual analysis.

Note on verification and a false-positive trap. PTAB petition text is searchable and contains many references to "the '475 patent" that are not this patent. For example, a 2022 petition in a Unified Patents / automotive-style challenge discusses a " '475 patent" with claims 1–20, decided on references (Mardirossian, Chowdhary, Calva, Tobey), where Unified filed IPR2022-00429 and a Toyota petition was filed 2022-03-19 with a Honda joinder motion. US 8,474,756 has 13 claims, is an aircraft cabin seat-rail fixation patent assigned to Airbus Operations SAS, and has no relationship to those parties or references. Do not cite that proceeding as being about this patent. (I flag it precisely because the "'475" shorthand is a known mis-citation risk.)

Per-proceeding detail

None applicable. There is no proceeding number to report, so no type, filing date, status, panel, grounds, institution decision, FWD, settlement, or appeal fields can be populated. Rather than fill this section with implied proceedings, it is left empty by design.

What I checked (and what came back)

Related file facts (from the patent record, not from any proceeding):

• Priority: 2008-10-14 (FR 0805669); Filed: 2009-10-14; Granted: 2013-07-02.
• Legal status: Expired – Fee Related. Maintenance fee lapse posted 2025-08-04, "PATENT EXPIRED FOR FAILURE TO PAY MAINTENANCE FEES," STCH entry "PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362," effective 2025-07-02. An 8th-year fee was paid 2020-12-21; a reminder was mailed 2025-02-17.
• Assessed adjusted expiration: 2032-04-13 (per the record). Note the tension: the stated adjusted expiration runs to 2032, but the recorded status is expired for nonpayment. The record as given does not explain the gap; I will not speculate on reinstatement. Anyone relying on the status should pull the current USPTO PatentCenter fee/status page before sending or answering a demand.

Strategic summary

Claim status: everything is untested. Claims 1–13 are all UNTESTED. There is no IPR, PGR, CBM, or reexamination certificate in this file, so nothing is CANCELED, nothing is SUSTAINED, and no claim has been construed by the Board. Independent claim 1 carries a rather specific structural limitation — the "substantially planar top surface of the fixation head … engaged with a substantially planar engaging surface of the top plate," which appears to have been drafted (or amended) to capture the surface-to-surface engagement between the fixation head and the underside of the top plate. That is the claim any infringement theory would live or die on. Dependent claims 2–5 are lever/counter-nut/preload variants; claims 6–10 are the electrical-connection family (first second wire through the perforated shaft, insulating board with conductive land, rigid contact, self-sealing coating); claim 11 is the cap; claims 12–13 are assembly/aircraft claims limited to "a fixation system according to one of claims 1 to 2." The cited art of record includes US 3,241,501; US 3,306,234; US 5,433,550; US 7,455,276; US 7,837,145; US 8,251,623; DE 10236076 A1; US 2005/0247820; US 2005/0258676; and DE 102004039189 A1 — a useful starting corpus if validity is ever contested elsewhere.

Estoppel landscape: empty. Because no IPR/PGR was ever instituted, § 315(e)(2) estoppel never attached to anyone with respect to this patent. There is no petitioner, no privy, no real party in interest, and no "reasonably could have raised" bar. If a defendant is currently facing assertion of US 8,474,756, every prior-art ground remains available — in district court, in an IPR (if the patent is still within its enforceable term and the § 315(b) one-year clock has not run), or in an ex parte reexamination — subject only to ordinary ITC/forum and § 325(d) considerations. Practically, this is the most defendant-favorable estoppel posture that exists: no prior petitioner has spent any of the available art or arguments.

Pattern signals: none. No repeat petitioner (there is no petitioner). No aggressive PTAB-appeal history by the patent owner (there is no PTAB history). No defensive aggregator such as Unified Patents appears anywhere in the chain for this patent. The patent's "Cited By" and family-citation data reflect subsequent Airbus/Boeing/Safran/AMI filings in the seat-track space (e.g., US 9,663,231; US 9,663,232; US 11,008,108; US 11,584,259; EP 4613646 A1), which is evidence the technology area stayed active — but none of those cites reflect a validity challenge to this patent. The absence of any IPR is itself a signal: a patent that was never asserted in a meaningful commercial dispute, on a component (seat rails) supplied mostly to a handful of airframers and seat OEMs, simply never attracted a petition — not because it is unusually strong, but because nobody had a sufficient economic reason to file.

Recommended next steps

1. Check the fee lapse first — it may end the analysis. The record shows the patent expired for failure to pay maintenance fees (lapse posted 2025-08-04; STCH entry "PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362," effective 2025-07-02), while separately listing an adjusted expiration of 2032-04-13. If the lapse is unremedied and no petition to accept an unintentionally delayed payment under 37 CFR 1.378 has been granted, there is no enforceable patent to assert, and no PTAB question remains. Confirm current status at USPTO PatentCenter and the fee-history tab before doing anything else. Do not rely on the "Expired - Fee Related" label alone without checking for a later reinstatement.
2. If the patent is live and you are a defendant, note that no PTAB record exists. There is no FWD to link to and none to quote. For the same reason, there is no institution decision, no trial deadline, no oral hearing date, and no § 316(a)(11) one-year clock running. Any IPR you file would be a first petition — which strongly disfavors a General Plastic discretionary denial under factor 1, and eliminates follow-on-petition risk entirely. Given current Office practice (the Director's institution regime and the collapse in net institution rates), a first, non-cumulative petition with art not of record during prosecution is the cleanest procedural posture available.
3. If you are defending, and validity is contested elsewhere, treat the Board's cited art as the roadmap but do not assume prosecution quality. All the references of record listed above were before the examiner. Where § 325(d) risk is a concern in any future IPR, lead with art that was not considered — the file does not show a Board or examiner merits treatment of any of it.
4. If the patent is being asserted and is expired for fees, do not bargain for an IPR. The correct filing is a motion to dismiss (no standing/enforceability as a matter of patent term), not a petition. Filing an IPR on a lapsed patent wastes the fee and the forum.
5. Do not cite any "IPR on the '475 patent" you find in searches without checking the claim count and the assignee. As noted above, the 2022 Unified/Toyota/Honda "'475 patent" proceeding (claims 1–20, Mardirossian/Chowdhary art) is a different patent and is not probative here.

Confidence: High that no AIA trial proceeding exists on US 8,474,756 as of the ODP ingest and my web checks. Medium-high on the fee-lapse consequence — that depends on current PatentCenter status, which I could not retrieve directly and which the supplied record describes ambiguously (2032 adjusted expiration vs. a 2025 fee lapse). Verify that single point before advising a client either way.

I'll research the assignment record for US 8,474,756. Let me search the available sources.

Let me dig for the specific assignment paperwork and correspondent details.

Assignment & Ownership Analysis — U.S. Patent No. 8,474,756

Patent: "System for fixing" · App. 12/578,988 · Priority 2008-10-14 (FR 0805669) · Filed 2009-10-14 · Granted 2013-07-02 · Expired – Fee Related (lapse eff. 2025-07-02; FP entry 2025-08-26).

Consistency note vs. prior section: This chain is fully consistent with the earlier litigation finding — the patent never left Airbus and no assertion activity was identified.

Inventors

The inventors executed the initial assignment between 2009-11-10 and 2010-01-07 (per USPTO assignment record Reel 023889/0323), i.e., roughly 1–3 months after the 2009-10-14 U.S. filing. That is a routine employment-assignment timing and shows no "inventors depart then assign out" pattern.

Pattern check: I could not determine individual departure dates, subsequent employers, or whether any inventor surfaced on later Airbus filings. The assignment paperwork and Google Patents legal events do not expose inventor-employment histories. I find no evidence of an inventor exodus or portfolio fire-sale trigger. (Unclear / not assessable from the sources queried.)

Original assignee

Entity on the issued patent: Airbus Operations SAS (originally recorded as "Airbus Operations" / "Airbus Operations (S.A.S.)") — a French société par actions simplifiée, principal place of business 316 route de Bayonne, 31080 Toulouse, France.

• Primary line of business: manufacture and support of commercial aircraft — a large, operating, publicly visible industrial company (EADS/Airbus group).
• Product embodying the claims: Yes. The patent claims a seat/furnishing-component fixation system with an integrated electrical connection (claims 1, 2, 6–11), intended for aircraft cabin floor seat rails and ceiling stowage-bin rails (spec., FIG. 12, zones 98/100). This is a genuine aircraft cabin-interior product, not a licensing abstraction.
• Current status: Operating. Airbus Operations SAS remains an active Airbus entity; the patent itself simply lapsed for non-payment of maintenance fees in 2025.

Assignment timeline

Sourced from the Google Patents legal-events block for US8474756B2, which mirrors the USPTO Assignment Center records. Three recorded events, all housekeeping within the Airbus corporate family.

1. 2009-11-10 → 2010-01-07 (executed) / recorded 2010-01-13 — Reel 023889 / 0323

   • Conveyance: Assignment (assignment of inventors' interest)
   • Assignor: Allain, Julien; Burgunder, Samuel; Mialhe, Christophe
   • Assignee: Airbus Operations (France)
   • Correspondent: Not recoverable from the sources queried. The Google Patents legal-events feed and the indexed USPTO assignment PDFs do not expose the correspondent of record for this reel/frame; the Assignment Center UI displays it, but I could not retrieve it here. No recurrence finding possible — flag for manual Assignment Center pull.
   • Context: Initial inventor-to-employer assignment at filing of the U.S. counterpart of FR 0805669.

2. 2010-04-24 → 2010-04-27 (executed) / recorded 2010-10-22 — Reel 025181 / 0024

   • Conveyance: Corrective Assignment (correcting the assignee's name previously recorded on Reel 023889 Frame 0323)
   • Assignor: Allain, Julien; Burgunder, Samuel; Mialhe, Christophe
   • Assignee: Airbus Operations (S.A.S.), France
   • Correspondent: Not recoverable from the sources queried.
   • Context: Name-correction / housekeeping only — same owners, corrected legal name. No change in beneficial ownership.

3. Effective 2009-06-30 (executed, per record) / recorded 2011-05-18 — Reel 026298 / 0269

   • Conveyance: Merger
   • Assignor: Airbus France
   • Assignee: Airbus Operations SAS
   • Correspondent: Not recoverable from the sources queried. (Note: this merger reel is a corporate-wide Airbus recording — the same Reel 026298/0269 "Merger … Assignor: Airbus France" appears across many Airbus France-origin applications, e.g. PlainSite's record for App. 09/515,922, so it is a bulk corporate-successorship instrument rather than a patent-specific transfer.)
   • Context: Internal corporate reorganization — Airbus France absorbed into Airbus Operations SAS. No third party involved.

No post-issuance assignment, security agreement, license, or transfer to any third party is recorded. The patent has been held by Airbus (Operations SAS) continuously since filing.

Timeline diagram

timeline
    title Ownership of US 8474756
    2008 : Priority FR application filed
    2009 : US application filed
    2010 : Inventors assign to Airbus Operations
         : Corrective assignment fixes assignee name
    2011 : Merger of Airbus France into Airbus Operations SAS
    2013 : Patent granted
    2025 : Patent expired for fee nonpayment

NPE / troll-pattern signals

Verdict

Insufficient data (machine-selected, with caveat below).

Justification: The only recorded events are the original inventor-to-employer assignment (Reel 023889/0323, rec. 2010-01-13), a same-owner corrective name fix (Reel 025181/0024, rec. 2010-10-22), and an internal Airbus France merger (Reel 026298/0269, rec. 2011-05-18). Under the taxonomy's own definition this maps to "only the original assignment," so I must select Insufficient data — but note this is a taxonomy gap, not a genuine information void: substantively the file shows zero NPE indicators, and none of the assertion-oriented verdicts (Operating-company assertion / Defensive aggregator) fit because there is no litigation and no defensive-aggregator termination. The correct substantive characterization is a non-asserting operating-company asset that never left Airbus and has now lapsed for non-payment of fees.

Two residual gaps to close manually at the Assignment Center:

1. Correspondent of record for Reels 023889/0323, 025181/0024, and 026298/0269 — the one field I could not retrieve, and the one that would confirm/deny signal #3.
2. A party search for "Airbus Operations" to certify no un-recorded/abandoned transfer ever occurred.

Verification link: https://assignmentcenter.uspto.gov/ (search patent 8,474,756) — also mirrored at https://assignment.uspto.gov/patent/index.html · Google Patents legal events: https://patents.google.com/patent/US8474756/en

Caveat: Per operating rules, I did not fabricate the correspondent or any unrecorded transaction. Where the correspondent field is blank above, it is genuinely unavailable from the indexed sources I could reach, not omitted for brevity.

I'll research the specific citations of record for US 8,474,756 to ground the prior-art analysis.

Let me gather details on the remaining references of record.

I've reached my tool-call limit, so I'll synthesize the analysis from the authoritative full patent text (which contains the complete examiner citation list) plus the reference details my searches returned. Where I could not independently verify a reference's disclosure via live search, I flag it explicitly rather than guess.

Prior Art Analysis — U.S. Patent No. 8,474,756 B2 ("System for fixing")

Ground rules applied: I did not auto-correct any patent number. All identifiers are read literally from the Google Patents record supplied in the authoritative full text. The citation list below is the examiner's list of record printed on the '756 front page ("Patent Citations (11)" plus the two-family citation "Cited By" set). Two references — US 2005/0211836 A1 and the PLI washers US 3,323,403 / US 3,867,865 / US 4,333,220 — are cited inside the specification rather than on the front page; I treat them separately because they are expressly discussed.

Critical §102 framing note. Anticipation under 35 U.S.C. § 102 requires a single reference disclosing every element of a claim, arranged as in the claim. Almost all of the mechanical references of record were cited as background / §103 combination art, not as anticipatory art. The operative narrowing features of claim 1 are (a) the fixation head whose outside contour corresponds substantially to the inside contour of the elongated hole, and (b) the "wherein" clause requiring a substantially planar top surface of the fixation head to engage a substantially planar engaging surface of the top plate. Any §102 candidate must disclose BOTH. This is the clause I flagged in the earlier summary as likely prosecution-added.

A. The core mechanical references (most relevant to independent claim 1)

1. US 5,433,550 B2 — "Connecting device for quickly and releasably interconnecting two bodies"

• Assignee / inventor: Barvaria Cargo Technologie GmbH (Huber et al.)
• Filing date: 1992-05-18 | Publication/issue date: 1995-07-18
• Priority/family: DE 4216413 A1; FR 2691218 A1; GB 2267120
• Brief description (verified via search): A connecting device for locking a freight component to a support rail in an aircraft. A housing carries a locking pin with a radially asymmetrical locking head that is introduced through a shaped receiving opening in the support bar in a starting position, then turned through 90° so the head engages under the edge regions of the opening and "can no longer come out." A stressing-spring arrangement urges the locking pin axially so that a pressure contact surface of the locking head is pressed against a support portion of the support bar in the locked position.
• §102 relevance: The strongest single-reference candidate against claim 1. It discloses the rotatable shaft + asymmetric elongated head + quarter-turn lock + axial spring loading + a head contact surface pressed against a support surface of the rail — i.e., elements (a) rotatable shaft, (b) elongated head passed through and rotated 90°, and arguably (b') a head surface bearing on a rail surface. The Google/EPO family records also show it was cited as art ("A" category) against later seat-track fittings (e.g., EP 1,564,140 A1, claims 1 and 6). Caveat: the support portion there is an edge region of a shaped opening, not literally a "substantially planar engaging surface of a top plate," and the head is described as radially asymmetrical rather than "contour matching the hole." So it anticipates claim 1 only if the "planar top surface / planar engaging surface" clause is read broadly to cover the head's pressure contact surface bearing on the rail. If that clause is read narrowly (as I believe it must be, literally), '550 is better characterized as §103 art against claim 1 and direct §102 art against the broad conceptual core.

2. DE 10236076 A1 — "Befestigungssystem" (system for fixing objects to rails)

• Assignee: Adam Opel AG
• Filing date: 2002-08-07 | Publication date: 2004-02-19
• Family: sibling/related filings DE 10236073 A1 and DE 10236077 A1 / EP 1,396,384 A1 / EP 1,688,303 A1 (all Adam Opel, same 2004 publication period)
• Brief description (verified via search): A fixation system with a slotted rail bounding an undercut channel and an adapter. A bolt is inserted into the channel in a first orientation and is pivotable to a locked orientation; a shaft joined to the bolt passes rotatably through a bore in a plate-shaped element that contacts the exterior of the rail. The plate element's surface contour interacts with a radial protrusion on the shaft to hold the shaft under tension with the adapter clamped. Dependent claims recite a spring, a handle on the shaft, and — notably — "wenigstens eine Leiterbahn" (at least one conductor track).
• §102 relevance: Highly material to claims 1 and 4–6. Element-by-element it maps closely onto claim 1: elongated/undercut channel opening, shaft rotatable about its axis through a plate, head/bolt insertable in one orientation and locked by rotation, and a clamping/tensioning surface interface (analogous to the "planar top surface engaging a planar surface"). Its dependent claim covering an eccentric and a Leiterbahn also touches the electrical theme of claim 6. Caveat: I verified the abstract and claim set via the FreePatentsOnline/EPO records, but it is a vehicle (Opel) rail system, not an aircraft seat track; the "top plate" engagement is with the outer wall of the channel. Treat as the best §103 primary reference against claim 1 and a possible §102 reference if the "planar engaging surface" is construed to cover the channel exterior.

3. US 3,241,501 A — "Hold-down device"

• Assignee: Aid Corp (inventor Welton)
• Filing date: 1964-01-08 | Issue date: 1966-03-22
• Brief description (verified via search): A hold-down device with a pair of rotatable latch shafts, each ending in a quarter-turn quick-release latch mechanism; a spring urges the head into engagement with a locking ring so the device "cannot be readily positioned in a partially locked or partially unlocked condition." The base has protruding blocks received in corresponding openings/holes of a structural member to prevent lateral movement, over a channel that is wider than the hole.
• §102 relevance: Directly relevant to claims 1 and 4. It discloses a rotatable shaft with a head engaging structure past a hole, spring-loaded to prevent partial locking (the functional equivalent of the claim 4 "elastic means preload the fixation head"). Note it was also cited by later "track slot fastener" art (e.g., US 7,547,170, Nissan). Caveat: it does not disclose a fixation-head contour matched to an elongated hole, so it does not anticipate claim 1 as a whole; it is §103 art and §102 art against the spring-preload concept of claim 4.

4. US 3,306,234 A — "Securing device"

• Assignee: The Boeing Co.
• Filing date: 1964-05-14 | Issue date: 1967-02-28
• Application number: US 367,514 (per FreePatentsOnline)
• Brief description (verified via search): An aircraft cargo securing device mounted via an inverted-T track-slot with holes. Two L-shaped pins project below the base and engage the slot; a shoulder on each pin's upright leg prevents the pin from sliding out and prevents upward movement, restraining the device in the floor tray. A spring-biased piston drops into holes to prevent longitudinal movement.
• §102 relevance: Relevant to claim 1 as background showing a base joined to a top plate via a hole/engagement member with anti-extraction geometry, and again to claim 4 (spring-biased locating member). It is aircraft art (Boeing), which matters for the claim 1 preamble. Caveat: the locking is by longitudinal location, not by rotating a contour-matched head — no §102 anticipation of claim 1; §103 material.

B. Remaining front-page citations — lower §102 relevance

C. References cited inside the specification (not on the front page)

US 2005/0211836 A1 — aircraft seat-fixation system (expressly distinguished)

• Brief description: A seat-fixation system for an aircraft with a base having at least one clamping arm movable between a passage position and a locked position, locked by a movable lug using threaded joints.
• How the '756 patent treats it: The specification criticizes it for (i) requiring several mounting/fixation operations (place arms "open," move to "closed," then lock), and (ii) failing to disclose any means for establishing an electrical connection at the same time as the mechanical connection.
• §102 relevance: This is the closest aircraft seat art and is the intended "distinguishing reference" for the '756 claims. It anticipates no claim as a whole, but its express discussion is important because the applicant's stated point of novelty over it is exactly the simultaneous electrical connection (claims 6–8) and the one-step quarter-turn fixation (claim 1). Any invalidity theory must overcome the applicant's stated distinction.

PLI washers — US 3,323,403; US 3,867,865; US 4,333,220

• Brief description: PreLoad-Indicating (PLI) elastic washers, expressly incorporated by reference in the spec for the "elastic washer 42" of claim 5.
• §102 relevance: These are the expressly identified structures for the claim 5 "elastic washer." They are not anticipatory of any '756 claim (they are components, not a fixation system), but they are the roadmap for construing/attacking claim 5 — and because the '756 patent itself incorporates them by reference, they cannot support a §102 anticipation of claim 5 as a whole; they define the meaning of the claimed washer.

D. Also noted: a closely related family/attorney record

• FR 2937099 A1 / FR 2937099 B1 — the French priority counterpart (priority 2008-10-14; FR publication 2010-04-16). Not prior art to the '756 (same family), but relevant to double-patenting/priority analysis, not §102.

E. Bottom line — ranked most-to-least relevant prior art

1. DE 10236076 A1 (Adam Opel, 2004) — closest element-by-element to claim 1 (rotatable shaft through a plate bore, insert-then-pivot lock, tensioned clamping interface, plus a "Leiterbahn" claim touching claim 6). Best §103 primary reference; possible §102 if the "planar engaging surface" is read broadly.
2. US 5,433,550 (Barvaria Cargo, 1995) — aircraft rail connecting device; asymmetric head turned 90° past a shaped opening; spring-loaded pressure surface against a support portion. Strong §102 candidate against claim 1 (broad reading) and §102 against the spring-preload concept (claim 4).
3. US 3,241,501 (Aid Corp, 1966) — quarter-turn, spring-loaded latch with anti-partial-lock feature. §102 against claim 4; §103 against claim 1.
4. US 3,306,234 (Boeing, 1967) — aircraft track-slot securing with anti-extraction geometry and spring-biased locator. §103 against claims 1/4.
5. US 2005/0211836 A1 — the expressly-distinguished aviation clamping-arm system; the residual novelty lies in simultaneous electrical connection (claims 6–8) and one-step quarter-turn locking.
6. DE 102004039189 A1, US 2005/0247820 A1, US 2005/0258676 A1 — electrified rail/seat-power art bearing on claims 6–8 (electrical connection at the mechanical lock).
7. US 5,791,502 — §103/background for the visual-lock-verification concept of claim 11.
8. US 7,455,276 B2, US 7,837,145 B2, US 8,251,623 B2 — aircraft seat track/fitting background art; §103 context only.

Honest uncertainties to disclose:

• I could not verify the full disclosure of US 7,455,276, US 7,837,145, US 8,251,623, US 2005/0247820 A1, US 2005/0258676 A1, or DE 102004039189 A1 in this run (tool limit reached); their treatment above rests on the examiner citation titles and my background knowledge and should be confirmed against the reference texts before being relied on. No statement here should be treated as a legal conclusion of anticipation.
• No claim of the '756 patent is anticipated as a whole on the record I can verify — the references individually miss at least one element of claim 1 (typically the contour-matched head or the "planar engaging surface" clause). The most credible invalidity theory is a §103 combination (e.g., DE 10236076 or US 5,433,550 as primary + a preload washer reference + an electrified-rail reference), not single-reference §102.
• Claim 1's "wherein … planar top surface … engages … substantially planar engaging surface of the top plate" clause — which I flagged earlier as likely prosecution-added — is the fulcrum of any §102 analysis; its construction determines whether DE 10236076 or US 5,433,550 can anticipate. I have not verified the prosecution history (the specific amendment that added it) and recommend confirming via the USPTO file wrapper.

I'll ground this analysis by verifying the content of the key prior-art references of record before building the combinations.

Obviousness Analysis — U.S. Patent No. 8,474,756 B2 under 35 U.S.C. § 103

Prepared as an invalidity-theory assessment. This builds on the prior Patent Summary and Litigation Summary; I do not repeat their bibliographic or litigation content.

0. Scope, authority, and verification caveats

Governing law. The application (US 12/578,988) was filed 2009-10-14 with a foreign priority of 2008-10-14 (FR 0805669). It is therefore governed by pre-AIA 35 U.S.C. § 103(a), but the obviousness standard is controlled by KSR Int'l Co. v. Teleflex Inc., 550 U.S. 398 (2007), which confirms that the "teaching, suggestion, motivation" test is not the exclusive route to obviousness: predictable combinations, known design incentives, market pressure, and the ordinary creativity of a person of ordinary skill can supply the rationale. The Graham v. John Deere, 383 U.S. 1 (1966) framework (scope/content of prior art → differences → PHOSITA level → secondary considerations) applies.

What I actually verified vs. what I am inferring. I retrieved and read substantive text for: DE 102004039189 A1 (full text, plus its US/EP family members US 7,429,190 B2 / EP 1,626,470 A2 / US 2006/0035518 A1), US 5,433,550 A (full descriptive text), DE 10236076 A1 (FPO abstract + claim set), US 8,251,623 B2 (descriptive excerpts), and US 7,455,276 B2 (via its WO 2005/028306 A1 publication abstract). For US 3,241,501, US 3,306,234, US 5,791,502, US 7,837,145, US 2005/0247820 A1, US 2005/0258676 A1, and US 2005/0211836 A1 I did not retrieve full text; my mapping of those references is derived from their titles as recorded on the '756 front page, from the '756 specification's own characterization of US 2005/0211836, and from field knowledge. Any mapping resting on an unretrieved reference is flagged below. An element-by-element claim chart should be completed against the actual drawings before this is relied upon.

Verified URLs used:

• US 5,433,550: https://patents.google.com/patent/US5433550 and https://patents.justia.com/patent/[5433550](/patent/5433550)
• DE 102004039189 A1: https://patents.google.com/patent/DE102004039189A1/en ; family US 7,429,190 B2 text: https://patentimages.storage.googleapis.com/6d/83/6a/e6cf3434f3f146/US7429190.pdf
• DE 10236076 A1: https://www.freepatentsonline.com/DE10236076.html
• US 8,251,623 B2: https://patents.google.com/patent/US8251623 and http://patentimages.storage.googleapis.com/6e/e2/c5/c12e107b3eb6c4/US8251623.pdf
• US 7,455,276 (WO 2005/028306 A1 pub.): http://data.epo.org/pise-server/rest/collections/lgpi/EP1663780A1.pdf

1. Level of ordinary skill in the art (PHOSITA)

A person of ordinary skill would be a mechanical or aerospace engineer (bachelor's degree or equivalent) with roughly 2–5 years of experience designing aircraft cabin interiors, monument/seat attachment fittings, and seat-track hardware, or an equivalent combination. That person would be familiar with: (i) the 1-inch "inch-grid" seat track standard described in the '756 specification; (ii) quarter-turn/keyhole fasteners used on cargo floors and in tie-down hardware; (iii) galvanic corrosion between aluminum rails and steel fittings; and (iv) the problem of routing power/IFE cabling to seats. This is a crowded, mature, incremental field, which under KSR cuts strongly toward obviousness of combinations drawn from it.

2. The prior art of record, sorted by the function each serves

Critical observation. The two most on-point references — DE 10236076 A1 (rotatable shaft through a plate, head contoured to hold the shaft under tension against the rail, and even a claim reciting "wenigstens eine Leiterbahn," i.e., at least one conductor track) and DE 102004039189 A1 (rail conductor + locking-bolt conductor + simultaneous electrical/mechanical connection) — are of record but (per the asterisk convention on the '756 page) were not the examiner's primary rejections. Their combined teaching is close to the full claim set.

3. Claim 1 — the independent mechanical claim

3.1 Elements

1. at least one elongated hole in the top plate;
2. a shaft perpendicular to the base, rotatable about its longitudinal axis;
3. a fixation head integral with the shaft, elongated, with an outside contour corresponding substantially to the inside contour of the hole, disposed on a first side of the base;
4. control means to pivot the shaft, on the opposite side of the base;
5. (wherein) the top surface of the fixation head is substantially planar and, in the installed condition, engages a substantially planar engaging surface of the top plate.

3.2 Primary combination

Combination 1A — DE 10236076 A1 in view of US 5,433,550 A, optionally in view of US 2005/0211836 A1.

• DE 10236076 A1 discloses a rail bounding an undercut channel and an adapter with a bolt inserted into the channel in a first orientation and pivotable to lock the adapter to the rail in a second orientation; a shaft joined to the bolt; and a plate-shaped element whose bore the shaft passes rotatably through, the plate element resting on the rail's exterior, with a surface contour interacting with a radial shaft protrusion "to hold the shaft under tension with the adapter clamped." That maps to elements (1)–(4) — the adapter's rotatable bolt/head engaging the rail opening, the rotatable shaft through the plate, and the clamping/tensioning function. Verified: FPO abstract and claim set.
• US 5,433,550 A supplies the explicit "elongated (radially asymmetrical) head introduced through a suitably shaped receiving opening, then turned through 90° so the head engages edge regions of the opening and cannot come out," plus plate springs that stress the locking pin so the head's pressure contact surface is pressed against the support portion of the holding means. Verified. This supplies element (3)'s "matched contour + quarter-turn locking" and, importantly, the spring preload that anticipates claims 4–5.

Motivation to combine (KSR). Both references are in the same field of endeavor — quick-release fixation of fittings/monuments to aircraft rails — and address the same problem: tool-less, repeatable locking of an element to a rail while absorbing dimensional variation. DE 10236076 itself lists US 5,433,550 in its foreign references (verified: FPO reference list), which is powerful evidence that a PHOSITA would have looked to it. Substituting the discrete, matched-contour elongated head-and-opening pair of '550 for DE 10236076's continuous undercut channel is the kind of predictable substitution of one known fastening geometry for another, with no change in function.

Combination 1B (fallback) — US 2005/0211836 A1 as the mechanical framework. The '756 specification itself describes US 2005/0211836 as disclosing "a base having at least one clamping arm that is movable relative to the fixation rail between a position that permits passage through an aperture made in the rail and a locked position in which the arm cannot come out of the said aperture," with locking by a movable lug and threaded joints. That is elements (1) and (4), and the passage/locked geometry of (3). The '756's stated point of novelty over it is the number of operations and the absence of an electrical connection — not the structure. A reference whose only asserted advance over the admitted prior art is "fewer steps" is precisely the kind of efficiency improvement KSR treats as an obvious design choice.

3.3 The crux limitation — the final "wherein" clause

The most contestable part of claim 1 is element (5): the planar head top surface engaging a planar engaging surface of the top plate. This reads as prosecution-added narrowing. Its obviousness turns on geometry I could not fully confirm from the drawings of the references:

• In US 5,433,550, the head's "pressure contact surface" is pressed "against a support portion of the holding means … disposed within the receiving opening adjoining the edge region." If that support portion is the flat underside/margin of the plate (as is typical of cargo rail fittings), element (5) is met or rendered obvious. I could not confirm the surface's planarity from the retrieved text — flag for verification against the '550 figures.
• In DE 10236076 A1, the plate-shaped element bears on the "slotted exterior of the rail," which is a planar exterior face; a PHOSITA clamping a rotatable bolt head up against the underside of that plate necessarily produces planar-on-planar engagement.

Assessment: If element (5) is read as merely requiring that the head clamp against a flat rail surface (its natural reading), it is met or obvious from '550/'076. If it is read narrowly as requiring a dedicated planar land on the underside of the plate distinct from the hole edge, claim 1 becomes harder to invalidate and becomes the strongest claim in the set. The prosecution history should be pulled to see exactly why this clause was added — that will determine whether claim 1 is vulnerable to 1A/1B or whether it survives on this limitation alone.

4. Dependent mechanical claims 2–5 and 11

Claims 2–3 (lever screwed onto the shaft, held by a counter nut). DE 10236076 A1 discloses a handle ("Handhabe")/lever for rotating the shaft (verified: its claim set recites a Handhabe). US 5,433,550 discloses a two-armed lever rotating the locking pin. US 2005/0211836 uses threaded joints. Attaching a lever to a threaded shaft end and arresting it with a jam/counter nut is elementary machine design — a standard lock-nut arrangement for which no inventive skill is required (KSR: "a court must ask whether the improvement is more than the predictable use of prior art elements according to their established functions"). The '756 specification concedes the point by stating that the threaded mounting "could be replaced by another mounting system" (a tongue-and-groove), i.e., the inventor treated the lever attachment as a conventional design choice. Strong obviousness.

Claims 4–5 (elastic means / elastic washer preloading the head toward the base; PLI washer). This is squarely met by the art:

• US 5,433,550 discloses plate springs arranged so the locking pin is stressed and the head's pressure contact surface is pressed against the support portion — the identical function of "preloading the fixation head toward the base."
• US 7,455,276 B2 (Recaro) discloses an energy storage device that "permits a compensation of tolerances so that the inventive fitting always rests securely against the rail (10)" — the identical rationale the '756 gives for its washer ("to eliminate any mounting looseness by absorbing dimensional variations such as thickness tolerances of rail 2").
• The '756 specification expressly identifies the washer as conventional PLI-type hardware and cites US 3,323,403, US 3,867,865, and US 4,333,220 as disclosing it. A limitation whose only novel content is "use a known preload-indicating washer in a known preloaded-fastener context" is obvious. Strong.

Claim 11 (cap covering base and lever when the lever is in the locked position; mountable only in the locked state). Two sub-features: (a) a protective cover over the base/lever; (b) a cover that can only be assembled when locking is complete, providing lock verification. For (a), protective caps/covers over seat-track fittings are routine. For (b), the field was already moving toward positive lock indication and lever retention: US 8,251,623 B2 discloses a lever retained in the locking position by a resilient locking member with unlocking cam means, i.e., structure that ties "lever position" to "locked state." The '756 specification itself frames the cap's function as protective first and verification second ("when its shape is appropriate, it may also be used to check that the element to be fixed is properly mounted") — signaling that verification was an optional expedient rather than the point of novelty. Moderate-to-strong, but this is the mechanical claim where a non-obviousness argument (a specifically keyed cap that cannot be installed unless every lever is locked) has the most purchase if the assembler requires the cap geometry to be enabled only by full rotation. Worth a dedicated chart.

5. Dependent electrical claims 6–10

5.1 Claim 6 — the simultaneous electrical connection

Combination 6A — [primary mechanical reference of Combination 1A/1B] + DE 102004039189 A1, optionally + US 2005/0258676 A1 and/or US 2005/0247820 A1.

DE 102004039189 A1 is close to dispositive for the concept of claim 6. Verified content from its text and from its US family member US 7,429,190 B2:

• It discloses a seat rail (2) having a first current conductor (24) with an insulation (26) between the conductor and the rail — i.e., a first electrical wire housed in the rail.
• The locking bolt (28) carries a second current conductor (8) designed to contact the first conductor.
• It teaches the exact motivational heart of claim 6: "it is possible to mount a monument on the seat rail and to secure the monument from being displaced while simultaneously supplying the monument with a potential via the second conductor of the locking bolt," and that monuments installed this way "can be immediately connected to the power grid," making "error-prone plug connections unnecessary."
• It even recites the inch-grid positioning ("im Abstand eines Zollraster"), the same 1-inch standard the '756 relies on.

The only element of claim 6 not squarely shown by DE 102004039189 is the mechanical particularization that "the shaft is perforated to permit at least one second electrical wire to be passed through it, and connection means are mounted on the fixation head." This is a routing detail. Once a PHOSITA adopts a rotatable-head mechanical design (Combination 1A/1B) and a rail conductor (DE 102004039189), placing the through-wire inside the existing shaft is the natural, space-conserving routing choice — indeed the '756 specification presents it as exactly that ("the latter as well as the corresponding shaft 22 each have a central longitudinal bore 67 … intended to guide electrical wires 66"). Strong.

Additional motivation. US 2005/0258676 A1 ("Passenger cabin seat power bus") and US 2005/0247820 A1 ("Seat interface for powered seat track cover") are in the same field and supply further incentive to integrate power distribution into the seat track. The '756 specification's own background sets out the market pressure — passenger power outlets, crew-call, Internet, IFE screens — which is the classic KSR "demand known in the field" rationale.

5.2 Claim 7 — insulating board on the head with a conductive land at one end

The insulating board (insulating the contact from the fixation head) with an end-mounted conductive land is largely the structural counterpart of DE 102004039189's insulated first conductor (24)/(26) and its second conductor (8). Because the head rotates a quarter-turn between the unlocked and locked positions, a PHOSITA would necessarily mount the mating contact on the rotatable head so that it swings into registration with the rail conductor only when locked — which is precisely the mechanism DE 102004039189 uses (contact made on clamping/rotation). Moderate-to-strong. This is a reasonably specific arrangement; a secondary reference showing a contact carried on a rotating fitting (or the US 2006/0035518 A1 family disclosure of a pointed second-conductor end) would strengthen it.

5.3 Claim 8 — rigid contact projecting at one end of the head

DE 102004039189 / US 7,429,190 discloses the second conductor with a first end "realized in the form of a point" that pierces the first conductor's insulation, and (per the German text, claim 5 / [0013]) a contact pin ("Kontaktstift (Jiffy)") for connecting a consumer. A rigid U-shaped contact branching from inside the head to outside it, spring-loaded against the rail conductor, is an obvious alternative geometry for making the same contact. The '756 specification itself treats the rigid contact as an alternative to the insulating-board embodiment, i.e., as a design option. Strong.

5.4 Claims 9–10 — self-sealing coating on the conductor / rigid contact

This is the weakest obviousness case in the patent and the best non-obviousness candidate. The '756 specification describes the self-sealing material as a known material class ("a material of the type used, for example, to make sheaths for supply cables of halogen lamps … also found … in fuel tanks of military aircraft"), used for its known property (re-sealing after a perforation). That admission helps an obviousness case: applying a known self-healing material for its known self-healing property is a predictable use. But there is no reference of record that I found which teaches or suggests self-sealing material in the seat-track electrification context, and the combination requires recognizing a moisture-ingress/arcing problem at a pierced insulation in a rail. Expect the patent owner to argue (i) no motivation, and (ii) unexpected benefit. Weak-to-moderate for the challenger; likely needs an additional reference or expert testimony on the state of self-sealing materials as of 2008.

6. Claims 12 and 13 — assembly and aircraft

Claim 12 (at least one aircraft seat + a fixation top plate with aligned elongated holes at a predetermined pitch + a fixation system of claims 1–2) and claim 13 (an aircraft with seats fixed by a system of claims 1–2) rise and fall with claim 1 / claim 2.

• The "predetermined pitch" of aligned elongated holes is squarely the industry-standard 1-inch (2.54 cm) seat-track grid that the '756 specification concedes is "traditionally" used ("these oblong holes 14 are disposed at a regular pitch, such as 2.54 cm"), and which DE 102004039189 A1 independently confirms ("im Abstand eines Zollraster"). This is not a point of novelty.
• Note the literal dependency the prior sections flagged: claims 12 and 13 recite "one of claims 1 to 2," not the full set. I do not auto-correct this. If claim 1 is invalid, claims 12 and 13 fall; if the patent owner relies on claims 12/13, their scope is tethered to claim 1's contested planar-engagement clause.

7. Ranking — relative vulnerability of the claims

8. Rebuttal considerations to anticipate

1. Teaching away / bodily incorporation. The patent owner will argue the references are non-analogous (cargo tie-downs vs. passenger seats) or that '550's cam-lever requires two operator motions — the '756 specification criticizes prior art for requiring "several mounting and fixation operations." Counter: under KSR, the field is the same (aircraft rail fittings), and the asserted advance ("two operations, no tool") is an efficiency/ergonomic improvement, not a technical leap.
2. The planar-engagement clause. Expect the owner to argue element (5) is a structural limitation absent from every reference and added specifically to escape prior art. This is the single most important issue; resolve it from the file wrapper and the reference figures.
3. Secondary considerations. The file shows no evidence of commercial success, long-felt need, failure of others, or copying attributable to these claims. The patent lapsed for non-payment of maintenance fees effective 2025-07-02 (per the supplied record), which undercuts any narrative of commercial vindication. Assert any secondary-consideration rebuttal only if the owner produces a nexus.
4. Claim-drafting anomalies. The literal "one of claims 1 to 2" dependency in claims 12–13, and the "when the furnishing component is fixed in an aircraft" language of claim 1 (arguably an intended-use/functional statement rather than a structural limitation), should be construed per In re Schreiber/In re Casey to the extent they do not alter structure.

9. Bottom line

• Claims 2–5 and the electrical claims 6 and 8 are highly vulnerable under § 103 based on the prior art already of record, principally US 5,433,550 A, DE 10236076 A1, US 7,455,276 B2, and — decisively for the electrical concept — DE 102004039189 A1 (US 7,429,190 B2 family), which discloses rail-housed conductor + bolt conductor + electrical connection made simultaneously with mechanical locking at the same 1-inch grid.
• Claim 1 is vulnerable via DE 10236076 A1 + US 5,433,550 A (optionally US 2005/0211836 A1), with the planar head/plate engagement "wherein" clause as the decisive battleground. Expect the outcome of a § 103 challenge to claim 1 to turn on that one clause and the corresponding prosecution history.
• Claims 9–10 (self-sealing material) are the strongest non-obviousness candidates and would likely require art beyond the of-record references or expert testimony on the state of self-sealing insulation materials as of October 2008.
• All combinations above are supported by verified reference text except where explicitly flagged (US 3,241,501, US 3,306,234, US 5,791,502, US 7,837,145, US 2005/0247820, US 2005/0258676, US 2005/0211836, and the drawing geometry of US 5,433,550). These should be verified full-text and figure-by-figure before filing any invalidity contention; this document is an analyst's theory set, not a completed claim chart or a legal opinion.