Costco Corporation has filed suit in Washington federal court, seeking a declaration that its discount golf ball, the Kirkland Signature (KS) ball, does not violate any patents held by golf brand Titleist’s parent, Acushnet Co.
Costco initiated this declaratory action when Acushnet allegedly sent “a threatening letter” accusing it of patent infringement and false advertising. Acushnet, a Massachusetts company, manufactures one of the top golf performance equipment brands, Titleist. The patents at issue, in pertinent part, relate to the hardness of the golf ball’s …
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