Co-created inventions

Where two or more persons have participated in creating a single invention and their respective shares in that collaboration are ascertainable, the extent of each person's participation shall be stated separately in the patent, and the rights arising from it shall belong to them in the same proportion. Where the work of each is not separate and distinct, or the extent of their participation in creating the invention cannot be determined, the names of all of them shall be stated in the patent, and the rights arising from the patent shall belong to all of them equally.