Acacia entity, Stingray IP, Wi-Fi patent found invalid

On February 5, 2026, the Central Reexamination Unit (CRU) issued an Advisory Action in the reexamination filing of U.S. Patent 7,224,678, owned and asserted by Stingray IP Solutions, an NPE and entity of Acacia Research Corporation. The Examiner maintained the rejections of all challenged claims of the ‘678 patent. The ‘678 patent relates to detecting an intrusion in a network system. It was asserted against Leedarson IoT, Schlage Lock, Hewlett Packard Enterprise, Vivint, and Allegion.

View district court litigations by Stingray IP. Unified was represented by in-house counsel, Alyssa Holtslander and Roshan Mansinghani, in this proceeding.

To view the reexamination request, visit Unified’s Portal: https://portal.unifiedpatents.com/exparte/90019718

Polaris PowerLED power management patent found invalid

On February 2, 2026, the Central Reexamination Unit (CRU) entered a notice of intent to issue a reexamination certificate cancelling challenged claims 18-21 of U.S. Patent 8,181,042, owned by Polaris PowerLED Technologies, LLC, an NPE. The ‘042 patent generally relates to power management in integrated circuits. It was the subject of a declaratory judgment action from Micron, which has settled.

View district court litigations by Polaris PowerLED. Unified was represented by in-house counsel, TJ Murphy and Kelly Hughes, in this proceeding.

To view the reexamination request, visit Unified’s Portal: https://portal.unifiedpatents.com/exparte/90019976

Two more Wilus Wi-Fi patents challenged

On January 30, 2026, Unified filed an ex parte reexamination proceeding against U.S. Patent 12,166,587, owned by Wilus Institute of Standards & Technology, Inc., an entity of Good Day to Invent, Inc. The ‘587 patent generally related to how to identify padding in Wi-Fi trigger frames. The '587 patent has not been asserted itself, but it is the latest issued patent in a family being used in litigation.

On February 3, 2026, Unified filed an ex parte reexamination proceeding against U.S. Patent 11,284,475, also owned by Wilus. The ‘475 patent is generally related to setting a Basic Service Set (BSS) color in a responsive Wi-Fi Physical Layer Protocol Data Units (PPDU) when a received PPDU does or does not include a trigger frame that indicates the BSS color. The '475 patent has not been asserted, but it is related to patents being used in litigation.

View district court litigations by Wilus. Unified is represented by Michael Jones and Jake Rosvold of Rothwell Figg and by in-house counsel, Jessica L.A. Marks and Vinu Raj, in these proceedings.

Additional Bunker Hill EV patents prior art found

Unified Patents plans to release charted prior art on Bunker Hill patents weekly until its assertion of invalid patents ceases. Unified has released several charts within the last few weeks:

Using Pearl, we have successfully identified and charted prior art against patents owned by Bunker Hill, an NPE and entity of Dominion Harbor Enterprises. U.S. Patent 8,086,364 outlines a system for optimizing the usage of energy storage components in vehicles by utilizing algorithms to match a vehicle's current location with map data, thereby enabling strategic energy use based on route information. U.S. Patent 10,549,648 features a multi-channel DC bus assembly, two traction motors, a transmission with planetary gears, and an internal combustion engine. U.S. Patent 11,374,508 focuses on an advanced drive system for vehicles featuring dual electric motors, a power conversion device, an energy storage system (ESS), a transmission, a power split device with planetary sets, and an energy management system (EMS).

Identified Prior Art on U.S. Patent 8,086,364 (click to download chart)

Identified Prior Art on U.S. Patent 10,549,648 (click to download chart)

Identified Prior Art on U.S. Patent 11,374,508 (click to download chart)

iScan2D Technologies device-pairing patent prior art found

The team at Unified used Pearl to successfully identify and chart prior art against U.S. Patent 11,664,123, owned by iScan2D Technologies, LLC. The ‘123 patent is broadly directed to wirelessly pairing a “wearable activity device” and a “mobile device” with at least one “camera sensor” via a “color coded digital scannable media”. The patent has been asserted against Apple.

Identified Prior Art

Download Prior Art