Intellectual Property Code
Section 107. Rights of Joint Owners. - If two (2) or more persons jointly own a patent and the invention covered thereby, either by the issuance of the patent in their joint favor or by reason of the assignment of an undivided share in the patent and invention or by reason of the succession in title to such share, each of the joint owners shall be entitled to personally make, use, sell, or import the invention for his own profit: Provided, however, That neither of the joint owners shall be entitled to grant licenses or to assign his right, title or interest or part thereof without the consent of the other owner or owners, or without proportionally dividing the proceeds with such other owner or owners. (Sec. 54, R.A. No. 165)