When drafting an assignment or litigating a case for a client who owns a patent by way of an assignment, many lawyers assume that an assignment giving the assignee 'all rights, title, and interest' allows the client to completely step into the shoes of the assignor.
Buyer Beware: When 'All Rights' Doesn't Mean What You Think
When drafting an assignment or litigating a case for a client who owns a patent by way of an assignment, many lawyers assume that an assignment giving the assignee 'all rights, title, and interest' allows the client to completely step into the shoes of the assignor. A patent assignment that purports to convey 'all rights' of the assignor, however, does not convey the right to sue for past infringement without an express provision granting the assignee this right.
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