Cedar Lane Technologies Inc. v. Sigma Defense Systems LLC

I'll research this case thoroughly before drafting. Let me start with several searches in parallel.

Let me dig into the docket beyond December 2022, the complaint itself, and the Unified Patents portal page.

Case Overview

Parties. Cedar Lane Technologies Inc. is a Canadian entity with a stated principal place of business in Nelson, British Columbia, and it is a classic non-practicing entity: Stanford's NPE Litigation Database categorizes it as a patent asserter operating on "acquired patents," with no apparent product business of its own. Between roughly 2020 and 2025 it filed well over a hundred infringement suits across the country — first in W.D. Tex. before Judge Albright and in D. Del., then spreading to E.D. Va., W.D. Pa., D. Colo., S.D.N.Y./E.D.N.Y. and elsewhere — almost always through Isaac Rabicoff of Rabicoff Law LLC (frequently alongside Napoli Shkolnik, and sometimes Philip Mann of Mann Law Group), as reflected in the Stanford database, Lexology's monthly retail patent litigation reports, and the dockets cited below. Sigma Defense Systems LLC is a very different animal: a Georgia-based, private defense contractor supplying software-driven C5ISR, CJADC2, SATCOM and DevSecOps systems to the DoD, including a Tactical Relay System described as a U.S. Government Program of Record for transporting and distributing tactical ISR data, and Navy work such as the CANES program (company/industry profiles aggregated at simplify.jobs; treat vendor profiles as secondary). Notably, this is not the same defendant as in Cedar Lane v. Sigma Corporation, No. 6:22-cv-01051 (W.D. Tex.), which Cedar Lane voluntarily dismissed on October 26, 2022 — about a week before filing here — against the Japanese lens/optics maker.

Patent and accused technology. The sole patent identified in the case metadata is U.S. Patent No. 8,537,242, "Host interface for imaging arrays," issued September 17, 2013, from an application filed October 27, 2005 as a divisional of the application that issued as U.S. Patent No. 6,972,790 (issued December 6, 2005), with priority back to January 2000 and a single named inventor, Mark Suska. In one line: the '242 claims, as a method, the plumbing that lets a continuously streaming image sensor hand pixels to an asynchronous host processor — receiving image data from an imaging array, buffering it in a FIFO, maintaining a FIFO counter, comparing the count to a FIFO limit, and generating an interrupt to the processor (gated by an interrupt-enable signal) to trigger read-out. In most of Cedar Lane's parallel suits the '242 was pleaded alongside the '790 apparatus patent; the metadata for this docket lists only the '242, and while a third-party complaint analysis keyed to this case number discusses both patents (consistent with Cedar Lane's standard two-patent form complaint), I have not reviewed the actual complaint and exhibits here, so I flag the discrepancy rather than resolve it. The accused products are the weakest-sourced point in this file: Cedar Lane's complaints identify "Exemplary Defendant Products" only in claim-chart exhibits, and I could not retrieve those for this docket. Based on Sigma Defense's public product profile (tactical ISR/video relay and sensor-fusion systems that ingest and distribute full-motion video from UAV and unattended sensors), the likely accused category is its tactical video/ISR distribution hardware and software — but that is an inference, not a verified fact, and should be confirmed against the complaint's Exhibit(s).

Posture, venue, and why it matters. Filed November 3, 2022 in the District of Colorado and assigned to Judge Daniel D. Domenico, with the case drawn to and referred to Magistrate Judge Michael E. Hegarty for scheduling, discovery and non-dispositive pretrial matters (Dkt. 6, 8); the docket shows a § 271 complaint with a jury demand, an AO 120 report to the PTO (Dkt. 9, 11), a scheduling conference set for January 25, 2023 (Dkt. 10), a stipulated extension making the answer due December 26, 2022 (Dkt. 12–13), and a further unopposed extension motion filed December 22, 2022 (Dkt. 14) — after which the public dockets I could reach are stale. The case is now closed per the case metadata and third-party trackers; I could not verify the closing document or date from a primary source, though a Sigma Defense company profile independently references the litigation as having "ended in 2023," which is consistent with a voluntary dismissal or early settlement in the first half of 2023. Venue is the analytically interesting choice: Cedar Lane is Canadian and Sigma Defense is Georgia-headquartered, so D. Colo. was almost certainly selected for a defendant facility or acts of infringement in the District (Colorado Springs is a major defense-software hub) under § 1400(b) — I have not verified Sigma Defense's Colorado footprint, so treat the venue rationale as unconfirmed. The case's significance is as a data point in the Cedar Lane campaign rather than as a ruling: it illustrates the 2022-vintage pattern of a high-volume NPE pairing two expired-or-near-expiry imaging-interface patents against a surprisingly broad set of targets — camera and surveillance OEMs, rental-car companies, printer makers, and here a mid-tier defense contractor — filed in a low-patent-volume district with a fast-extension-then-dismiss trajectory. Because the '242 family's twenty-year term ran from the 2000 priority/filing dates (with any PTA), the recoverable damages window was already narrow and largely historical by the time of filing, which helps explain both the small-case economics and the quick exit. I found no PTAB proceeding on the '242 in my searches (Patsnap's record for the patent lists no validity challenges), and nothing to suggest this particular case spawned an IPR, though Unified Patents does maintain a patent-specific page for US 8,537,242

I'll research this case across docket sources, PTAB records, and legal news outlets.

Let me dig into the later docket entries and the PTAB record.

Cedar Lane Technologies, Inc. v. Sigma Defense Systems LLC

D. Colo. No. 1:22-cv-02884 · Judge Daniel D. Domenico (referral: Mag. J. Michael E. Hegarty) · Patent: U.S. 8,537,242 ("Host interface for imaging arrays") · Status: closed

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Bottom line first

This was a short-lived, low-intensity assertion in Cedar Lane's nationwide § 271 campaign. It ran roughly eight months from filing to closure, generated no merits rulings of any kind — no motion-to-dismiss order, no transfer or stay ruling, no Markman order, no summary judgment, no trial — and, in the public record I could verify, no PTAB proceeding on the '242. The docket shows only pleadings-stage housekeeping (service, referral, two unopposed extensions of the answer deadline) before the case was closed in 2023.

Important sourcing caveat: the free docket mirrors (Justia, UniCourt) for this case are frozen at 2022-12-22 (Doc. 14); Justia explicitly notes "This docket was last retrieved on December 22, 2022." I was not able to retrieve the terminating docket entry itself. So I can confirm the case is closed and that it ended in 2023 (corroborated by third-party company commentary noting "Cedar Lane Technologies litigation ended in 2023"), but I am not representing the exact dismissal document, date, or prejudice terms as verified fact. Everything below is flagged accordingly.

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Chronology

1. Filing and initial pleadings — November 2022

Pleading-stage assessment. The complaint follows Cedar Lane's standard template: infringement is pleaded almost entirely by reference to claim-chart exhibits and generic "Exemplary Defendant Products," with no product named in the narrative and no specific claims identified in the body. That is a standing vulnerability — it invites a Rule 12(b)(6) or § 101 eligibility challenge — but in this case the defense never had to test it, because no answer or counterclaim ever appears on the retrieved docket. No answer, amended answer, or counterclaim for invalidity/noninfringement is recorded.

Venue note (analyst observation). D. Colo. is an unusual forum for Cedar Lane, which overwhelmingly used W.D. Tex. (Albright) and D. Del. That choice probably reflects Sigma Defense's Colorado footprint. It also placed the case before a judge with a lighter patent docket and, notably, far less tolerance for low-content NPE complaints than the Waco default — a factor weighing toward early voluntary dismissal rather than motion practice.

2. The patent — and why its term matters

The '242 is a divisional of the application that issued as U.S. 6,972,790 (filed 2000-12-21; issued 2005-12-06); the '242 application was filed 2005-10-27 and the patent issued 2013-09-17. Because term runs 20 years from the earliest non-provisional filing (2000-12-21), the '242's enforceable life was always going to end far earlier than its 2013 issue date suggests.

Commercial litigation databases (Patsnap) record an estimated expiry of 2023-08-01 for both the '790 and the '242 (calculating from the 2000-12-21 priority date plus PTA). Treat that date as an estimate, not a verified PTO record — I did not independently confirm PTA on the face of the patent. But if roughly accurate, it is the single most strategically significant fact in this case: the '242 reached end of term in mid-2023, which (a) eliminated any injunctive leverage, (b) closed the front end of the damages window, and (c) coincides precisely with the wave of Cedar Lane dismissals in 2023 across its portfolio (see § 5). A reasonable inference — flagged as inference — is that expiration, not the merits, drove the termination of this case.

3. Pre-trial motions of substance

None. Specifically:

• No Rule 12(b) motion to dismiss (for improper venue, failure to state a claim, or § 101) was filed or decided.
• No § 1404(a) transfer motion. Notably, Sigma did not seek transfer to a more convenient forum despite being a Georgia-headquartered government contractor; the extensions of the answer deadline are consistent with an early negotiation track rather than motion practice.
• No motion to stay pending IPR (there was no IPR to stay for — see § 6).
• No summary judgment motion, no Daubert motions, no dispositive R&R from Mag. J. Hegarty.

4. Claim construction, discovery, trial

• Markman: the case never reached claim construction. No Joint Claim Construction Statement, no Markman briefing, no hearing, no order. Because the scheduling conference itself (2023-01-25) appears never to have produced a live schedule, no claim-construction deadline was ever set.
• Discovery: no Rule 26(f) report, no scheduling order, no infringement or invalidity contentions, no written discovery, no depositions, and no discovery motions appear on the record. There were zero discovery milestones, and thus no discovery rulings with strategic significance to report. (The scheduling conference and proposed scheduling order deadlines set on 2022-11-08 were overtaken by closure.)
• Trial / verdict / JMOL / new trial / fee motions: none. No trial date was set, no verdict, no Rule 50 or 59 motions, no § 285 fee motion.

5. Final disposition

• 2023 (exact date unverified): case closed. Third-party litigation records classify 1:22-cv-02884 as closed, and Sigma Defense–related industry commentary states the "Cedar Lane Technologies litigation ended in 2023." The retrieved docket ends at Doc. 14 (2022-12-22).
• Mechanism (inference, not verified): the near-certain path was a Fed. R. Civ. P. 41(a)(1)(A)(i) notice of voluntary dismissal by Cedar Lane — the identical mechanism Cedar Lane used in contemporaneous cases. Verbatim examples from sibling matters:
  • Cedar Lane v. Pryntec, No. 6:22-cv-00955 (W.D. Tex.), dismissed 2023-06-09: "Pursuant to Federal Rule of Civil Procedure 41(a)(1)(A)(i), Plaintiff hereby dismisses this action without prejudice. Defendant has not yet answered the Complaint or moved for summary judgment."
  • Cedar Lane v. Hertz Global Holdings, No. 6:22-cv-01216 (W.D. Tex.), dismissed 2023-03-29: same rule, with prejudice, "Each party shall bear its own costs, expenses, and attorneys' fees."
  • Cedar Lane v. Skydio, No. 1:22-cv-01408 (D. Del.) — dismissal entered 2023-02-10.
  • Cedar Lane v. Zhuhai RaySharp, No. 6:22-cv-01030 (W.D. Tex.) — 2023-05-30.
  • Cedar Lane v. Johnson Controls Int'l, No. 6:22-cv-00539 (W.D. Tex.) — 2023-02-10.
• Practical effect: closure at the pleadings stage, before an answer, means no judicial determination of infringement, validity, enforceability, or claim scope, and no precedent from this case. Any license or payment (if one exists) is undocumented on the public docket — Cedar Lane's dismissals were frequently unaccompanied by any disclosed consideration.
• No appeal. Nothing was appealable; there is no Federal Circuit docket arising from this case and no IPR appeal.

6. Parallel PTAB proceedings

I located no IPR, PGR, or CBM petition against U.S. 8,537,242 in the sources reviewed. Patsnap's record for both the '790 and the '242 lists "Validity challenges: None recorded," and no IPR certificate, FWD, or institution decision tied

I'll research the docket and counsel for this case.

Let me get the full docket and check for any additional plaintiff appearances (e.g., local counsel or withdrawals).

Plaintiff's counsel of record — Cedar Lane Techs. Inc. v. Sigma Defense Systems LLC, No. 1:22-cv-02884 (D. Colo.)

Bottom line

The public record shows one attorney appearing for Cedar Lane Technologies, Inc.: Isaac Philip ("Isaac P.") Rabicoff of Rabicoff Law LLC — the same lawyer who signed the complaint. No local counsel, no co-counsel, and no in-house counsel appear on the plaintiff's side in the docket entries I could retrieve (Dkt. 1–14, last public retrieval Dec. 22, 2022).

Docket support

• Dkt. 1 — Complaint for Patent Infringement filed 11/3/2022 by "Attorney Isaac Philip Rabicoff," who was "added to party Cedar Lane Technologies Inc." (Justia docket 219540, D. Colo.).
• Dkt. 2 — Notice of Entry of Appearance by Isaac Philip Rabicoff on behalf of Cedar Lane Technologies Inc., filed 11/3/2022.
• Dkt. 3, 4, 9 — Corporate Disclosure Statement, Summons Request, and Form AO 120 patent report, all signed/filed by Rabicoff on plaintiff's behalf.
• Plaintiff demanded a jury but is not shown with separate trial counsel.
• Defendant side (for contrast): Scott F. Llewellyn entered for Sigma Defense (Dkt. 12 stipulated extension, 11/21/2022; Dkt. 14 unopposed extension, 12/22/2022).

Sources: https://dockets.justia.com/docket/colorado/codce/1:2022cv02884/219540; https://unicourt.com/case/pc-db5-cedar-lane-technologies-inc-v-sigma-defense-systems-llc-[1331076](/patent/1331076)

Relevant experience note on Rabicoff

• He is the routine outside counsel for Cedar Lane's assertion campaign against the '242/'790 "host interface for imaging arrays" family, filing dozens of complaints in W.D. Tex., D. Del., E.D. Va., N.D. Cal., and D. Colo. around 2020–2023 (e.g., Cedar Lane v. Konica Minolta, No. 6:22-cv-01074-ADA (W.D. Tex.), notice of dismissal signed "/s/ Isaac Rabicoff"; Cedar Lane v. Sigma Corp., No. 6:22-cv-01051 (W.D. Tex.)).
• Notable adverse ruling: In Cedar Lane Techs. Inc. v. Blackmagic Design Inc., No. 3:20-cv-01302-VC (N.D. Cal.), Judge Chhabria sanctioned Rabicoff $1,000 under Rule 11 and referred him to the court's Standing Committee on Professional Conduct (Order, Nov. 19, 2020), finding he repeatedly filed patent suits without seeking pro hac vice admission; he later paid $9,193 in unpaid pro hac vice fees under an informal resolution approved Feb. 4, 2022 (In re Isaac Rabicoff, No. 20-mc-80206-JD). The matter also generated a California State Bar disciplinary proceeding.
  • Sources: https://cases.justia.com/federal/district-courts/nevada/nvdce/3:2025cv00103/[173189](/patent/173189)/37/0.pdf; https://storage.courtlistener.com/recap/gov.uscourts.cand.[354364](/patent/354364)/gov.uscourts.cand.354364.29.0.pdf
• Practical implication for this case: consistent with that pattern, no pro hac vice application or local-counsel appearance appears in the retrieved D. Colo. docket — the case resolved (per third-party case summaries, it is now closed, with the litigation reportedly ending in 2023) before admission practice was tested.

Caveats / things I could not verify

1. The dismissal filing itself is not in the sources I could pull. Justia's docket was last retrieved Dec. 22, 2022 and shows only through Dkt. 14; UniCourt's snapshot (updated Jan. 2, 2023) still listed the case as "Pending." Your metadata says the case is closed, and third-party summaries say the Cedar Lane–Sigma Defense litigation ended in 2023, but I could not retrieve the actual Rule 41 dismissal entry or its date. Anyone needing the record should pull PACER for D. Colo. 1:22-cv-02884 for entries after Dkt. 14 (possible Dkt. 15+).
2. No sealed-material issue identified — nothing suggests the appearances were sealed; the docket entries above are public. But because the public docket snapshot ends in December 2022, I cannot rule out a later appearance (e.g., substitute or local counsel) or a withdrawal that post-dates the snapshot. I found no evidence of any such attorney, and I have not invented any.
3. Firm details: Rabicoff Law LLC's address in the 2022–2023 case filings was the Alexandria, VA address (5680 King Centre Dr., Suite 645); later D. Colo./other dockets list Chicago, IL (4311 N. Ravenswood Ave., Suite 315). Both appear in court records; use the address as of the filing date if precision matters.
4. No Law360 or Reuters coverage of this specific case's counsel was located in my searches; the counsel identification rests on the docket entries cited above.

I'll research the docket and counsel appearances for this case.

Bottom line

Only one attorney is documented on the public docket as counsel of record for Sigma Defense Systems LLC in D. Colo. No. 1:22-cv-02884: Scott F. Llewellyn of Morrison & Foerster LLP (MoFo), Denver office. He is the sole filer on every defense-side entry I can verify, and because he is Colorado-admitted and resident in MoFo's Denver office, he effectively served as both lead and local counsel. I found no record of separate local counsel, additional firm counsel, or in-house counsel appearing for Sigma.

Counsel of record for Defendant

Docket basis for his appearance:

• ECF No. 12 — Stipulated Motion for Extension of Time to File Answer or Otherwise Respond to Complaint, filed Nov. 21, 2022 by Llewellyn for Sigma Defense Systems LLC (granted Nov. 21, 2022, ECF No. 13; answer due 12/26/2022).
• ECF No. 14 — Unopposed Motion for Extension of Time to File Answer or Otherwise Respond re ECF No. 1, filed Dec. 22, 2022 by Llewellyn (attachments: proposed order).
• Docket reports (Justia, UniCourt) list the defendant's attorney of record as "Scott F. Llewellyn."

Sources: https://dockets.justia.com/docket/colorado/codce/1:2022cv02884/219540 ; https://unicourt.com/case/pc-db5-cedar-lane-technologies-inc-v-sigma-defense-systems-llc-1331076 ; https://cle.cobar.org/cvweb/cgi-bin/memberdll.dll/info?WRP=facultyBio.htm&customercd=[257533](/patent/257533) ; https://www.martindale.com/attorney/scott-f-llewellyn-[379258](/patent/379258)/ ; https://www.bestlawyers.com/lawyers/scott-f-llewellyn/[117349](/patent/117349) ; https://www.courtlistener.com/docket/[4195753/307](https://assignmentcenter.uspto.gov/search/patent/reelFrameDetail?reelFrame=4195753-0307)/potter-voice-technologies-llc-v-apple-inc/

Explicit caveats — what I could not verify

1. No notice of appearance is visible in the free docket snapshots. The Justia docket was "last retrieved on December 22, 2022"; UniCourt's mirror was last updated January 2, 2023. The first defense filing shown is the Nov. 21 stipulated extension (ECF 12), signed by Llewellyn — but the underlying notice of entry of appearance (if separately docketed as an early numbered entry) is not reproduced in these mirrors. I am therefore identifying him from his signed filings, not from an entry-of-appearance PDF I have read.
2. Post-December 2022 filings are not in public free sources I could retrieve. The case is now closed (per the case metadata and third-party trackers noting the Cedar Lane–Sigma dispute "ended in 2023"), and it is possible that additional MoFo attorneys, co-counsel, or in-house counsel appeared after Dec. 22, 2022, or that a Rule 41(a) notice of voluntary dismissal was filed (the typical disposition for Cedar Lane's campaigns). I could not retrieve the dismissal entry or any later appearance; anyone needing certainty should pull the full PACER docket sheet for entries after ECF No. 14. I am not naming any second or successor counsel because I have no source for one.
3. No sealed-material issue identified. Nothing in the retrieved entries indicates sealing of appearance records; the gap is a docket-coverage gap, not a sealing gap.
4. Do not confuse with a different defendant. Cedar Lane Technologies Inc. v. Sigma Corporation, No. 6:22-cv-01051 (W.D. Tex., Judge Albright) is a separate case against a different company and was voluntarily dismissed Oct. 26, 2022. Defense counsel there is unrelated and should not be attributed to Sigma Defense Systems.
5. In-house counsel for Sigma (Perry, Georgia): no in-house attorney is identified on the docket in any source I found; if Sigma had internal IP counsel participating, that fact is not publicly documented here.

For completeness on the other side: Plaintiff Cedar Lane was represented by Isaac Philip Rabicoff of Rabicoff Law LLC, Chicago (ECF No. 2, Notice of Entry of Appearance, Nov. 3, 2022; AO 120 notice at ECF No. 9).