Co-owning any piece of property can lead to unwanted and unexpected headaches. And as demonstrated by the Federal Circuit in STC.UNM v. Intel Corp., Fed. Cir. No. 2013-1241, this is especially true with respect to co-ownership of patents. Here, the Federal Circuit held that STC lacked standing to bring its patent infringement lawsuit against Intel because Sandia Corp., a co-owner of the patent-in-suit, refused to voluntarily join the lawsuit, and could not be involuntarily joined under Federal Rule of Civil Procedure 19(a).