Unity of invention and double patenting law and practice in Canada can create challenges for patent applicants. For example, applicants may not expect a unity of invention objection to be raised, requiring claims to be...more
Obviousness-type double patenting (“OTDP”) arises when two or more patents or applications include claims that, while not being identical, are not patentably distinct from each other. In the U.S., OTDP rejections can be...more