Althearidge LLC v. Cipherlab Co Ltd

Case Overview & Background

In a patent infringement lawsuit filed on April 17, 2026, Althearidge LLC accuses Cipherlab Co Ltd of infringing on two patents related to wireless communication technology. The plaintiff, Althearidge LLC, appears to be a non-practicing entity (NPE), also known as a patent assertion entity, as it has no evident business operations or products beyond patent litigation. Such entities are typically formed to acquire patents and generate revenue through licensing and lawsuits. The defendant, Cipherlab, is a publicly-traded Taiwanese operating company that designs and manufactures automatic identification and data capture (AIDC) products, including rugged mobile computers and barcode scanners used across logistics, retail, and healthcare industries. Cipherlab has a significant U.S. presence, with its North American headquarters located in Plano, Texas.

The lawsuit targets the technology within Cipherlab's wireless-enabled products, such as its mobile computers that incorporate Wi-Fi, 4G LTE, and other cellular communication standards. The allegedly infringing technology is a method for improving the reliability of data transmission in wireless systems called "constellation rearrangement for ARQ transmit diversity schemes." This technique involves altering the bit-to-symbol mapping (the "constellation") when a data packet is re-transmitted due to an error, a process known as Automatic Repeat reQuest (ARQ). The two patents asserted by Althearidge are:

• U.S. Patent No. 7,154,961: Titled "Constellation rearrangement for ARQ transmit diversity schemes," this patent describes a method to enhance performance by using different data mapping for retransmissions.
• U.S. Patent No. 7,567,622: This patent, also listed in the complaint, relates to similar methods of improving data transmission reliability in wireless communications.

The case was filed in the U.S. District Court for the Eastern District of Texas (EDTX), a venue that has long been favored by patent plaintiffs for its reputation of having experienced patent judges, plaintiff-friendly local rules, and a relatively fast track to trial. After a period where its dominance waned following the Supreme Court's 2017 TC Heartland decision on venue, the EDTX has recently resurged as the nation's top venue for patent litigation, particularly for cases brought by NPEs. This case is notable as it exemplifies the classic NPE assertion model: an entity with no products suing a technology manufacturer in a preferred jurisdiction over patents concerning widely used communication standards. The outcome could have broader implications for other device manufacturers that utilize similar wireless data re-transmission protocols. The specific judge assigned to the case has not yet been made public, and there is no information available regarding any parallel Inter Partes Review (IPR) proceedings before the Patent Trial and Appeal Board (PTAB) at this early stage of the litigation.

Legal Developments & Case Posture (as of 2026-05-04)

As the lawsuit was filed very recently on April 17, 2026, there have been no substantive legal rulings or significant strategic developments in the case. The docket remains in its earliest administrative phase.

A review of the docket for Althearidge LLC v. Cipherlab Co Ltd, 2:26-cv-00308, in the Eastern District of Texas, shows the following key events in chronological order:

• 2026-04-17: Plaintiff Althearidge LLC filed its Complaint for patent infringement against CipherLab USA, Inc., asserting U.S. Patent Nos. 7,154,961 and 7,567,622 (Dkt. 1). On the same day, Althearidge filed its Rule 7.1 disclosure statement (Dkt. 2) and a request for the Clerk to issue a summons for the defendant (Dkt. 3). The plaintiff also filed the required notice to the U.S. Patent and Trademark Office regarding the patent case (Dkt. 4). Attorneys Steven Kalberg and David R. Bennett of Direction IP Law filed notices of appearance for the plaintiff, Althearidge LLC.

• Current Status: The case is currently open and pending the assignment of a judge. As of May 4, 2026, the defendant, Cipherlab, has not yet filed an answer or any other response to the complaint. No attorneys have formally appeared on Cipherlab's behalf. The summons has been requested but there is no confirmation of service on the docket. Typically, a defendant has 21 days to respond after being served, or longer if service is waived.

There have been no motions to dismiss, transfer, or stay the case. The litigation has not reached discovery or claim construction stages.

Parallel Proceedings

A search of the U.S. Patent and Trademark Office's Patent Trial and Appeal Board (PTAB) database reveals no Inter Partes Review (IPR) or other post-grant proceedings filed by Cipherlab or any other party against U.S. Patent Nos. 7,154,961 or 7,567,622 as of this date. It is too early for an IPR to have been filed in response to this specific lawsuit, as defendants often wait to develop their invalidity contentions in the district court case before petitioning the PTAB.

Notably, on the same day this suit was filed, Althearidge LLC also filed a lawsuit against Viasat, Inc. in the Western District of Texas, asserting the same two patents. This indicates a broader assertion campaign by Althearidge related to this patent portfolio. Cipherlab was previously a defendant in another patent case in the Eastern District of Texas, Televo LLC v. CipherLab USA, Inc., which was dismissed with prejudice after 170 days, suggesting a potential settlement. This prior experience in the venue may inform Cipherlab's strategy in the current case.

Counsel for Plaintiff Althearidge LLC

Based on a review of the initial filings in the case docket, two attorneys have made appearances on behalf of the plaintiff, Althearidge LLC. Both are from the same intellectual property law firm.

David R. Bennett

• Role: Lead Counsel
• Firm: Direction IP Law (Chicago, IL)
• Experience Note: Mr. Bennett has over 20 years of patent litigation experience, has served as lead counsel in numerous patent cases, and has experience litigating in the Eastern District of Texas. His past representations include large-scale assertion campaigns for entities like GeoTag and Parallel Networks.

Steven M. Kalberg

• Role: Counsel
• Firm: Direction IP Law (Chicago, IL)
• Experience Note: While public information on Steven Kalberg's specific litigation history is less detailed, his association with Direction IP Law alongside David Bennett indicates a practice focused on intellectual property litigation and assertion.

As of May 4, 2026, no other attorneys have filed a notice of appearance for the plaintiff. No local counsel within the Eastern District of Texas has formally appeared on the docket, though this may change as the case proceeds. Counsel for the defendant, Cipherlab Co Ltd, has not yet appeared.

Counsel for Defendant Cipherlab Co Ltd

As of May 4, 2026, no attorneys have formally filed a notice of appearance on behalf of the defendant, Cipherlab Co Ltd, or its U.S. subsidiary, CipherLab USA, Inc..

The case was filed on April 17, 2026, and the summons was requested the same day.. Defendants typically have 21 days to respond to a complaint after service is effected. Given the recent filing date, it is not unusual that defense counsel has yet to appear on the official court docket. The docket should be monitored for a notice of appearance or a responsive pleading, such as an answer or a motion to dismiss, which will identify Cipherlab's legal representation.