Cedar Lane Technologies Inc. v. Sixt Rent A Car

I'll research this case using multiple searches to verify the details.

Case Overview & Background

The parties. Plaintiff Cedar Lane Technologies Inc. is a Canadian non-practicing entity formed in British Columbia on April 29, 2019, with longtime monetization figure Greg Benoit as director/president and an address that corresponds to IP licensing firm Pigott & Co. It acquired a portfolio of roughly 100 former Intellectual Ventures patents (routed through AVInnov LLC and Steephill Technologies) and became one of the highest-volume patent plaintiffs in the U.S. — by one 2022 tally it had filed roughly 272 suits, and it was reportedly the top-filing NPE of 2022, with IAM pegging a ~96% settlement rate among its terminated cases (RPX, Nov. 9, 2019; IAM, Mar. 20, 2023; Seyfarth NPE Showcase, Oct. 6, 2022). Cedar Lane is also a sanctioned repeat player: in 2020 Judge Vince Chhabria (N.D. Cal.) sanctioned Cedar Lane and its counsel Isaac Rabicoff for advancing "objectively frivolous" positions in bad faith and referred Rabicoff to the court's professional-conduct committee. Defendant Sixt Rent A Car, LLC is the U.S. operating subsidiary of Germany's Sixt SE, an international vehicle-rental company (entity relationship from general corporate knowledge; the case docket does not elaborate on Sixt's business). Cedar Lane was represented by Isaac Rabicoff (Rabicoff Law LLC, Chicago), with Napoli Shkolnik listed as co-counsel in the November 2022 campaign wave; Sixt was represented by Daniel Scardino (Scardino LLP) and Paige Arnette Amstutz (Scott, Douglass & McConnico LLP, Austin) (Patsnap case record; Patexia docket).

The patents and the accused technology. The asserted family is the "Host interface for imaging arrays" family. U.S. Patent No. 6,972,790 (filed Dec. 21, 2000, claiming priority to a Jan. 21, 2000 provisional; issued Dec. 6, 2005; sole inventor Mark Suska) claims, in representative claim 1, an interface for an image sensor comprising (a) a memory storing imaging-array data at the sensor's clock rate (e.g., a FIFO), (b) a signal generator that issues an interrupt/bus-request to a host processor "in response to the quantity of data in the memory," and (c) circuitry that then transfers data out at the processor's rate — i.e., a hardware bridge that decouples a CMOS sensor's synchronous video-style stream from a processor's address-based memory access (Google Patents; ExParte complaint analysis). Litigation databases record U.S. Patent No. 8,537,242 (the 2005 divisional of the '790, issued Sept. 17, 2013, with a FIFO-counter/FIFO-limit/interrupt method claim) as also asserted in this case, although the case metadata here lists only the '790 — flagging that discrepancy (Patsnap). Notably, the '790's estimated expiration was August 1, 2023, and the patent's assignment chain runs from the original Canadian developer (Teklogix/Psion Teklogix Systems) through an Intellectual Ventures affiliate to Cedar Lane in May 2019 (USPTO assignment records). The complaint itself did not publicly identify the accused Sixt products or services: it referred to "Exemplary Defendant Products" charted only in claim-chart exhibits that were not attached to the public filing — a pattern confirmed in the parallel '790/'242 complaints in this campaign, where the theory is essentially that any product or service incorporating a camera sensor with a FIFO-buffered host interface infringes (ExParte complaint analysis). Sixt was sued alongside Hertz, Enterprise, Avis Budget, Orlando Rentco, Xerox and OpenEye in Cedar Lane's November 2022 "retail/rental" wave asserting the '790, '242 and 6,473,527, and the specific Sixt instrumentality (most plausibly camera/photo-based vehicle-inspection or mobile-app functionality, given the defendant cohort) is not documented in any public source I could locate — that is an inference, not a verified fact (Nov. 2022 Retail Patent Litigation Report).

Procedural posture, venue, and why it matters. Cedar Lane filed on November 29, 2022

I'll research this case systematically, starting with the docket and the asserted patent.

Now let me get the full docket and check for PTAB proceedings on the asserted patents.

Let me dig into the docket details, the motion to dismiss, and any PTAB activity.

Bottom line

This case never got past the pleadings. Cedar Lane filed a two-patent complaint against Sixt on 2022‑11‑29 in Judge Alan D. Albright's Waco court, Sixt answered the pleading clock with extensions and then a Rule 12(b)(6) motion, and before Cedar Lane ever filed a response — 175 days after filing — Cedar Lane unilaterally dismissed the case with prejudice under Rule 41(a)(1)(A)(i), each side bearing its own fees and costs. There was no answer, no counterclaim, no Markman, no discovery of substance, no trial, and no appeal. No PTAB proceeding on the asserted patents appears anywhere in the record.

A note on the metadata: the case caption in this prompt lists only US 6,972,790, but the complaint actually asserted two patents — the '790 patent and its divisional, US 8,537,242 (both titled "Host interface for imaging arrays"). Both databases and the docket reflect the pair.

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Chronological development

Filing and pleadings

Cedar Lane's complaint was a short-form NPE pleading: it alleged infringement of "one or more claims" of the '790 patent (system claims directed to an on-chip interface with a buffer/FIFO, an interrupt-generating signal generator, and a transfer circuit clocked by the host) and of the '242 patent (method claims covering the FIFO-counter/interrupt method). Critically, the complaint did not name accused products in the body — it referred to "Exemplary Defendant Products" and incorporated infringement claim charts as exhibits that were not publicly filed. That pleading structure is the single most likely target of Sixt's Rule 12(b)(6) motion, though I could not retrieve the motion's text and therefore cannot state its actual grounds with confidence.

There was no answer and no counterclaim. The dismissal notice expressly recites that "Defendant Sixt Rent A Car, LLC has not yet answered the Complaint or moved for summary judgment," which is precisely the condition that makes a Rule 41(a)(1)(A)(i) dismissal effective without leave of court.

Pre-trial motions of substance

• Motion to dismiss (Dkt. 14, 2023‑04‑28) — the only substantive motion filed. It was never decided; briefing was twice extended and never completed.
• No motion to transfer (Sixt is a Florida/New Jersey‑based rental company but did not seek transfer out of W.D. Tex.), no motion to stay pending IPR, no summary judgment motion.

Claim construction / discovery / trial

None. There was no scheduling order in the record, no exchange of infringement or invalidity contentions, no Markman briefing or hearing, no fact or expert discovery of record, and no trial setting, verdict, or post‑trial motion. This is a pure pleadings-stage case.

Final disposition

On 2023‑05‑23 Cedar Lane filed a notice of voluntary dismissal with prejudice:

"Pursuant to Federal Rule of Civil Procedure 41(a)(1)(A)(i), Plaintiff Cedar Lane Technologies Inc. hereby dismisses this action with prejudice. Defendant Sixt Rent A Car, LLC has not yet answered the Complaint or moved for summary judgment. Each party shall bear its own costs, expenses, and attorneys' fees."

Two features are worth flagging for a litigator's read:

1. Unilateral but with prejudice. Because Sixt had not served an answer and had not moved for summary judgment, a pending Rule 12(b)(6) motion did not block a noticed dismissal — Rule 41(a)(1)(A)(i) permits dismissal as of right at that stage. Cedar Lane chose to make it with prejudice, which permanently forecloses re-assertion of these patents against Sixt (subject to the ordinary Rule 60 relief standards) and therefore functions as a one-way door for plaintiff only.
2. No fee-shifting. The "each party bears its own fees" term and the absence of any Rule 41(a)(2) conditions indicates a negotiated walk-away rather than a litigated capitulation. Whether a confidential license or covenant not to sue accompanied it is not disclosed in any public filing I could locate — treat that as unknown, not as established.

The dismissal came as Cedar Lane was closing out a cluster of similar W.D. Tex. '790/'242 cases in spring 2023 (e.g., Cedar Lane v. Via Technologies, No. 6:22‑cv‑01305, dismissed with prejudice 2023‑04‑25; Cedar Lane v. Pryntec, No. 6:22‑cv‑00955, dismissed without prejudice 2023‑06‑09), consistent with a broader wind-down of the campaign rather than anything Sixt-specific.

Parallel PTAB proceedings

None identified. No IPR or PGR on either the '790 or '242 patent is reflected in the district court docket, and third-party litigation records for the '790 patent list "validity challenges: none recorded." No petition by Sixt (or by any other Cedar Lane defendant in this wave) surfaced in my searches. Caveat: I could not run an independent PTAB docket query by patent number within this session, so this conclusion rests on the absence of any PTAB reference in the litigation databases and reporting reviewed. If you need certainty, run a PTAB Trial Statistics / Patent Trial and Appeal Board Endpoint search on both patent numbers before relying on it.

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Strategic significance

• Venue/patent context. This was part of Cedar Lane's November 2022 rental‑car sweep — complaints against Sixt, Enterprise, Hertz, Avis Budget and Orlando Rentco over the image‑interface patents, reported in the November 2022 Retail Patent Litigation Report alongside contemporaneous Cedar Lane filings against Xerox and OpenEye (Rabicoff Law and Napoli Shulnik as plaintiff's counsel). Cedar Lane is a British Columbia NPE formed in 2019 that acquired a large former Intellectual Ventures portfolio through Steephill Technologies, and it has asserted the '790 patent in roughly 50+ suits.
• The '790 patent's term was the real clock. Third-party databases list the '790 patent's estimated expiration as 2023‑08‑01 (issued 2005‑12‑06; application filed 2000‑12‑21; earliest priority 2000‑01‑21). If that estimate is right, the patent expired roughly two months after this dismissal, which would sharply limit any future assertion value and would explain both the rapid dismissals across the campaign and why a defendant might prefer to run out the clock on a Rule 12(b)(6) motion rather than buy a license. I flag this as a database estimate, not a judicially determined term.
• The '242 patent carries a longer tail. As a divisional issuing 2013‑09‑17, the '242 patent is the more durable asset from this family — but it too was dismissed with prejudice as to Sixt here.
• Pleading quality mattered. The combination of a boilerplate complaint with publicly unfiled claim charts and unnamed "Exemplary Defendant Products," followed by two self-requested extensions of the response deadline and then a with-prejudice dismissal the week the response was finally due, is the classic signature of a plaintiff that preferred a negotiated exit to testing its pleading under Rule 12(b)(6) — particularly in front of a judge whose standing orders require early contentions and case-narrowing.

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Sourcing and gaps

Well-sourced: the docket chronology and the verbatim dismissal text (Patexia docket record for No. 6:22‑cv‑01231; Patsnap litigation record; UniCourt docket extract; Stanford NPE Litigation Database entries for patent 6,972,790 and for Sixt). Not verified: (i) the actual grounds and exhibits of Dkt. 14 — PACER document images were not retrievable here, so the Rule 12(b)(6) theory above is inference, not fact; (ii) any settlement/license consideration behind the dismissal; (iii) the specific docket numbers of the companion Enterprise/Hertz/Avis/Orlando Rentco suits, which I did not pull individually; (iv) a direct PTAB search confirming zero IPR/PGR filings against the '790 and '242 patents.

I'll research this case and Cedar Lane's counsel of record.

Bottom line

Only one attorney appeared for Cedar Lane in this case: Isaac P. Rabicoff of Rabicoff Law LLC (Chicago, IL), who filed the complaint and signed every plaintiff-side filing through dismissal. No local counsel, no co-counsel, and no in-house counsel appear on the docket. The case closed roughly six months after filing (23 May 2023) by voluntary dismissal with prejudice under Rule 41(a)(1)(A)(i), before Sixt answered — which is why the plaintiff-side appearance list is so short.

Plaintiff's counsel of record

Docket record for his appearance (Dkt. 6:22-cv-01231, W.D. Tex., Judge Alan D. Albright):

• Doc. 2 (Nov. 29, 2022) — Notice of Attorney Appearance by Isaac Rabicoff for Cedar Lane. Clerk flagged it as incorrectly filed; ordered re-filed.
• Doc. 8 (Nov. 30, 2022) — Corrected Notice of Attorney Appearance by Isaac Rabicoff for Cedar Lane.
• Rabicoff also signed the complaint (Doc. 1, with Exs. 1–4), the Rule 7 disclosure statement (Doc. 3), the notice of related case (Doc. 6), both unopposed extension motions (Docs. 15, 16) responding to Sixt's Rule 12(b)(6) motion (Doc. 14), and the notice of voluntary dismissal (Doc. 17, May 23, 2023).

Who did not appear (important negatives)

• Napoli Shkolnik PLLC — Secondary trade coverage of the November 2022 Cedar Lane filing wave lists "Rabicoff Law; Napoli Shkolnik" as plaintiff's counsel across the group of Cedar Lane suits against Xerox, Enterprise, Hertz, Orlando Rentco, Sixt, Avis and Openeye, spread across W.D. Tex., D. Del. and N.D. Tex. (see the November 2022 Retail Patent Litigation Report, Lexology/LexBlog). However, no Napoli Shkolnik attorney appears anywhere on the Sixt docket; that firm's appearances were in the parallel D. Del./N.D. Tex. matters. Treat the survey entry as describing the campaign, not this docket.
• Kenneth A. Matuszewski (Rabicoff Law LLC) — Rabicoff's usual PTAB backup counsel and frequent co-signer on Rabicoff Law PTAB filings; he did not enter an appearance in this case.
• No local counsel was retained. This is consistent with practice before Judge Albright, who does not require a local-rule appearance; Rabicoff has appeared in W.D. Tex. patent cases without a Texas firm.
• No in-house counsel for Cedar Lane appears; Cedar Lane is a non-practicing entity and litigates through outside counsel.

Filing status / reliability caveats

• Nothing on the plaintiff's side is sealed. The docket is a short, fully public patent docket; the only non-public materials would be any attorney-admission paperwork, which is not reflected in this docket.
• I could not pull the PACER docket sheet directly. The entry list above is reconstructed from PACER-derived aggregators (Patexia's document list for the case, UniCourt's docket transcription, Justia Dockets) plus Patsnap's litigation record; all three are consistent as to Rabicoff being the sole plaintiff appearance. If you need PACER-certified verification, pull the docket for 6:22-cv-01231 (W.D. Tex.).
• Note one open point I could not source: whether Rabicoff was admitted generally in W.D. Tex. or appeared pro hac vice in this action. No pro hac vice motion appears on this docket, which suggests admission was already on file from his earlier Cedar Lane W.D. Tex. filings, but I did not find a source confirming it — treat that as an inference, not a fact.

Sources: Patexia Research docket/documents page for Cedar Lane Techs. v. Sixt Rent A Car, No. 6:22-cv-01231; UniCourt case page (same); Justia Dockets; Patsnap litigation record (case closed 29 Nov 2022 – 23 May 2023, voluntary dismissal, plaintiff counsel listed as Isaac Rabicoff / Rabicoff Law LLC); Rabicoff Law firm bio (rabilaw.com/rabicoff.html); Law360 firm/attorney profile for Isaac P. Rabicoff (Chicago, IL); USPTO PTAB filings listing Rabicoff's address and Reg. No. 74,147; November 2022 Retail Patent Litigation Report (Lexology / LexBlog / Illinois Lawyer Now) for the "Rabicoff Law; Napoli Shkolnik" campaign-level listing.

I'll research the defendant-side appearances in this docket.

Defendant's counsel of record — bottom line

Sixt appeared through two Texas attorneys at two Austin firms: Daniel Scardino of Scardino LLP (the substantive/lead counsel, who signed the Rule 12(b)(6) motion) and Paige Arnette Amstutz of Scott, Douglass & McConnico LLP (an Austin IP-litigation partner who functions as the local/firm-side counsel — see caveat below). No in-house Sixt attorney appears anywhere on the docket. Defendant never answered; the case died on Cedar Lane's Rule 41(a)(1)(A)(i) dismissal with prejudice (Doc. 17, May 23, 2023) while the motion to dismiss was still pending.

Counsel table

Docket record for the defendant's appearances

• Doc. 10 (Feb. 24, 2023) — "NOTICE of Attorney Appearance by Daniel Scardino on behalf of Sixt Rent A Car, LLC. Attorney Daniel Scardino added to party Sixt Rent A Car, LLC (pty:dft)." This is the operative defendant-side appearance entry.
• Doc. 12 (Mar. 6, 2023) — Rule 7 Disclosure Statement filed by Sixt Rent A Car, LLC, signed by Scardino (identifies Sixt SE / Sixt Transatlantik GmbH as corporate parents in Sixt's parallel filings).
• Doc. 14 (Apr. 28, 2023) — Motion to Dismiss for Failure to State a Claim by Sixt, filed by Scardino with Exs. 1–3 and a proposed order. Scardino signed this — the only substantive defensive filing in the case.
• Doc. 17 (May 23, 2023) — Cedar Lane's notice of voluntary dismissal with prejudice under Rule 41(a)(1)(A)(i), expressly stating "Defendant Sixt Rent A Car, LLC has not yet answered the Complaint or moved for summary judgment."

Reliability caveats (read these before quoting the table)

1. Amstutz's exact docket entry is not verified. Two independent PACER-derived aggregators list Paige Arnette Amstutz / Scott, Douglass & McConnico as Sixt's counsel (Patsnap's litigation record and UniCourt's attorney panel), and Patsnap's case summary states "Daniel Scardino and Paige Arnette Amstutz appear for defendant Sixt Rent A Car." However, the Patexia document list I could retrieve is incomplete — it skips Docs. 9, 11 and 13 — so I could not read her notice of appearance text. The missing entries (likely Doc. 9 and/or 11, filed between Feb. 24 and Apr. 4, 2023) are the probable location. Pull the PACER docket for 6:22-cv-01231 to confirm her entry number and date; do not cite a doc number for her without that check.
2. The lead/local characterization is an inference, not a docket designation. The docket carries no "lead counsel" or "local counsel" label. Scardino signed every substantive defense filing (Rule 7 statement, MTD), and SDM is the Austin firm that routinely appears in W.D. Tex. patent cases, so the lead/local split is the natural reading — but it is my inference from filing behavior, not a sourced fact.
3. No pro hac vice motion for Scardino appears on this docket, which is expected: he is Texas-barred (Tex. Bar No. 24033165) and admitted in W.D. Tex., so no PHV was needed. Same for Amstutz (Tex. Bar No. 00796136). I did not independently verify either attorney's W.D. Tex. admission status from a court source.
4. Nothing on the defense side is sealed. This is a short, fully public docket. The absence of an answer, counterclaims, invalidity contentions or IPR petitions means there is no defensive work product to mine here — Sixt's entire defense visible on this docket is the one Rule 12(b)(6) motion, whose three exhibits (Exs. 1–3) I could not retrieve in text.
5. No parallel PTAB proceeding by Sixt against US 6,972,790 appears in the record for this case; Patsnap's patent-level litigation page for US 6,972,790B2 lists no validity challenge associated with this docket. Treat "no IPR" as a record-based observation, not a certification.
6. Contradiction flag (minor): UniCourt's page is stamped "last updated 01/28/2023" yet lists Amstutz as defendant counsel — a date before the Feb. 24, 2023 defense appearances. That stamp is unreliable; the Feb. 24 date on Doc. 10 is the controlled reference point.

Sources: Patexia Research documents page for Cedar Lane Techs. v. Sixt Rent A Car, No. 6:22-cv-01231 (Docs. 2, 8, 10, 12, 14, 15, 16, 17, 18); Patexia attorney profile for Daniel Scardino (listing 6:22-cv-01231, Defendant, Sixt Rent a Car, LLC, Scardino LLP); UniCourt case page (defendant attorney Paige Arnette Amstutz); Patsnap litigation record and case summary (counsel of record: "Daniel Scardino · Paige Arnette Amstutz"; firms "Scardino LLP, Scott, Douglass & McConnico LLP"; dismissal text quoted verbatim); scottdoug.com attorney bio for Paige Arnette Amstutz (Google/Nest Hub Albright verdict; Motorola; Schlumberger; Garmin; AT&T); Scardino LLP / Reed & Scardino filings and TTAB/PTAB correspondence giving the 501 Congress Ave. address and Tex. Bar No. 24033165; Law.com, "Litigator of the Week: Daniel Scardino" (Dec. 1, 2014) re the $23.6M MTel verdict; SDM notice of appearance in VideoShare, LLC v. Meta Platforms, No. 6:21-cv-00254-ADA (Doc. 10) for Amstutz's standard appearance form and bar number.