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Impinj Sues NXP for Patent Infringement

The maker of passive UHF RFID transponder chips and reader chips claims NXP has improperly used its patented innovations in NXP's UCODE integrated circuits.
By Mark Roberti

Among the U.S. patents Diorio claimed in his post that NXP's UCODE chips infringe are the following:

AutoTune: A feature introduced in Impinj's Monza R6 tag chips that tunes the chip's radio on every power-up, in order to maximize tag sensitivity for the current environment.

Integra: A suite of diagnostics designed to ensure consistently accurate data capture from RFID tags.

Enduro: A chip-attach technology used to connect a Monza IC to an inlay antenna using large, flat metal pads rather than the conventional bump.

FastID: A system for reading the serial number and tag ID more quickly, for applications in which the integrity of the RFID tag must be confirmed (primarily anticounterfeiting).

Dossett said that the 26 patents cited in the lawsuit involve innovations, including features that make Impinj tag chips perform better and more reliably. They are not subject to the GS1 IP policy that provides royalty-free access to the intellectual property necessary to practice the GS1 Gen 2 air-interface protocol.

"None of the patent claims we asserted are necessary to practice the GS1 protocol," he said. "We are unwavering in our commitment to the GS1 protocol."

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