Elaine's new boyfriend, Jerry's mechanic David, has stolen a bedroom move from Jerry. Jerry wants him to stop using it, but Elaine wants to continue to enjoy it. In the end, Jerry ends up "selling" the property right for a cheaper bill for car repair.
Elaine comes up with the idea of selling only the top parts of muffins; within days her old boss has opened a muffin-top store, capitalizing on her idea. Elaine needs protection for her idea, which is the role of the patent/trademark system.
Kramer invents "The Beach" cologne. Jerry tells him to run it by a guy in marketing at Calvin Klein, and Kramer does. The guy scoffs at the idea, but CK begins producing a cologne called "The Ocean." Without a patent, Kramer is powerless to seek recourse.
Stan discusses the US-government definition of a patent, the rights that patents confer, and the disclosure neccesary to obtain a patent. He also provides a brief background on the history of the patent system.