Interstate Patents Sues Resideo in East Texas on Camera, Communicator, and Platform Patents.

The complaint

The case is Interstate Patents, LLC v. Resideo Technologies, Inc. and Resideo LLC, No. 4:26-cv-01536 (E.D. Tex., Sherman Division), a 20-page complaint for patent infringement filed October 20, 2026, ECF No. 1. Interstate Patents says it is a Texas limited liability company with its principal place of business in Lago Vista, Texas. It says Resideo Technologies, Inc. is a Delaware corporation and that Resideo LLC is a Delaware limited liability company, and alleges, on information and belief, that Resideo LLC is a wholly owned subsidiary of Resideo Technologies, Inc. The complaint states that its allegations are based on Interstate Patents' own knowledge as to itself and its own actions, and on information and belief as to all other matters. The docket's October 20, 2026 assignment entry shows the case assigned to District Judge Sean D. Jordan.

The patents and accused products

The complaint asserts U.S. Patent 8,163,591, titled Backside Illuminated Image Sensor (issued April 24, 2012); U.S. Patent 7,853,856, titled Forming of Error Correction Data (issued December 14, 2010); and U.S. Patent 8,078,618, titled Automatic Multimode System for Organizing and Retrieving Content Data Files (issued December 13, 2011). It says Interstate Patents is the owner of each patent with the exclusive right to sue. Exemplary accused products include the ClareVision Performance Series 8MP Motorized Varifocal Color at Night Turret Camera (listed in the complaint as both CLR-V300-8TVFCN and CLR-V300-8TVFCNB) and the Luma X20 4MP IP PTZ Camera (LUM-420-IP-PTZ-25W) for the '591 patent; the LTEM-P Advanced Modular Communicator (FCC ID CFS-LTEMP), which the complaint says is sold under the Honeywell Home brand, and other listed LTE communicators for the '856 patent; and the Total Connect 2.0 app, web portal, and AI Smart Search feature for the '618 patent.

What the patents cover

Claim 1 of the '591 patent covers a method of providing light at a backside of a substrate, reflecting that light onto a front side of a depletion region to generate and store a photoelectric charge, and applying a bias signal at the front side of the depletion region to control the size of the depletion region.

Claim 13 of the '856 patent covers a device for reconstructing missing data packets with a communication interface that receives data packets and error correction data packets, and a processing module that determines whether all data packets were received, evaluates positioning information, distributes the data packets into a block of equal-size data symbols, with each data packet associated with a known position in that block, and the error correction packets into a block of error correction symbols, and recovers missing data packets from those symbols.

Claim 21 of the '618 patent covers a display device that stores content data files accessible to the device, takes a user request for those files, and uses a controller that determines how many groups each of several listed categorization methods would generate, selects one method whose group count falls within a predetermined range, and represents the resulting groups on a display.

What the lawsuit alleges

Counts I through III allege direct infringement of at least claim 1 of the '591 patent, claim 13 of the '856 patent, and claim 21 of the '618 patent, literally or under the doctrine of equivalents. The complaint further alleges induced and contributory infringement of those patents, knowledge from an August 20, 2026 letter that enclosed claim charts, and that Resideo's direct and indirect infringement has been and continues to be willful, at least since Resideo received that letter. It also alleges that Resideo has a policy or practice of not reviewing the patents of others and so has been willfully blind to Interstate Patents' rights. It seeks a permanent injunction or an ongoing royalty, damages including increased damages under 35 U.S.C. 284, interest, a finding that the case is exceptional under 35 U.S.C. 285 with attorney fees, and a jury trial. The same day, Interstate Patents also filed No. 4:26-cv-01533 and No. 4:26-cv-01534 (E.D. Tex.), whose docket entries list claim charts for the same three patents.

What to watch next

Watch for Resideo's answer or first responsive motion, and any motion practice on the willfulness allegations tied to the August 20, 2026 letter. Also watch the companion suits, Nos. 4:26-cv-01533 and 4:26-cv-01534 (E.D. Tex.). The case can end at any time, including by settlement or voluntary dismissal.