Professional Membership
“...[A] security interest in a patent that does not involve a transfer of rights of ownership is
a “mere license” and is not an assignment , grant or conveyance” within the meaning of 35 U.S.C. § 261. And because § 261 provides that only an “assignment, grant or conveyance shall be void” as against subsequent purchasers and mortgagees, only transfers of ownership interests need to be recorded with the PTO.” 204