Recording.
Section 53
SEC. 53. Recording.—The Director shall record assignment, licenses and other instruments relating to any rights, title or interest in and to inventions, and patentes and or inventions covered thereby., which are presented in due form to the Office for registration, in books and records kept for the purpose. The original document together with a signed duplicate thereof shall be filed, but if the original is not available, an authenticated copy thereof in duplicate may be filed. Upon recording, the Director shall retain the duplicate, and return the original or the authenticated copy to the party filing with a notification of the fact of record. Notice of the recording shall be published in the Official Gazette. Such instruments shall be void as against any subsequent purchaser or mortgagee for a valuable consideration and without notice unless it is recorded in the Office within three months from the date thereof, or prior to the subsequent purchase or mortgage.