Securitize has sued digital securities infrastructure firm tZERO in federal court in Delaware, seeking a declaration that its DS Protocol and Vault Registrar do not infringe two tokenization-related patents. The action came after tZERO sent a cease-and-desist letter demanding that commercialization stop by June 18 or face injunctive relief and damages, a claim Securitize called baseless. The dispute underscores growing intellectual property risks in tokenized assets, where patent enforcement can shape competition, product development and market entry.