Any mark and its registration shall be assignable with the goodwill of the business in which the mark is used, or with that part of the goodwill of the business connected with the use of and symbolized by the mark. Assignment shall be by instruments in writing duly executed and may be recorded with the administrator upon the payment of a fee of $15.00, payable to the state, who, upon recording of the assignment, shall issue in the name of the assignee a new certificate for the remainder of the term of the registration or of the last renewal thereof. An assignment of any registration under this act is void as against any subsequent purchaser for valuable consideration without notice, unless it is recorded with the administrator within 3 months after the date thereof or prior to the subsequent purchase.