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Headwater sued multiple wireless carriers asserting a five-patent set including the '464 patent; the case was dismissed without prejudice by joint stipulation under Rule 41(a)(1)(A)(ii), each party bearing its own costs.

Headwater's February 2025 suit against AT&T entities asserted the same five-patent set including the '464 patent; it was dismissed without prejudice by joint stipulation under Rule 41(a)(1)(A)(ii).

Headwater sued Google asserting a seven-patent set including the '464 patent, targeting Google mobile devices, eSIM-enabled devices, and Google Fi MVNO services. The case was pending with active motion practice.

Headwater sued Charter Communications in the August 2025 wave asserting a seven-patent set including the '464 patent, as identified in PTAB petition disclosures. The case was pending.

Headwater sued DISH entities asserting a seven-patent set including the '464 patent; EchoStar's Form 10-Q stated it intended to vigorously defend and disclosed potential damages exposure.

Headwater sued Comcast Cable Communications d/b/a Xfinity asserting the same seven-patent set including the '464 patent as in related cases, per PTAB petition disclosures. The case was pending.

Apple Inc. filed a declaratory judgment action against Headwater Research LLC in the Northern District of California, asserting U.S. Patents 9,232,403; 9,491,564; and 8,639,935. The action was terminated November 3, 2025 via stipulated dismissal. U.S. 8,745,191 was not listed among the asserted patents.