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Slingshot Printing LLC sued Canon U.S.A., Inc. and Canon Solutions America, Inc., asserting four patents including the '523 patent; Canon counterclaimed for declaratory judgments of invalidity and noninfringement of all four. The case was stayed on December 1, 2022 pending IPRs. After the PTAB's Final Written Decision in IPR2022-01416, the docket reflects termination around late 2024, though the precise disposition was not confirmed.

Slingshot Printing LLC sued HP Inc. in the Western District of Texas, asserting the '341 patent along with nine other patents. The case was transferred from Waco to Austin. HP filed related IPR petitions that terminated after settlement, but the final district-court disposition was not confirmed.