This page provides information on the types of patents and types of patent applications, and the examination process. Due to the enactment of the America Invents Act in 2012, this page contains forms for patent applications filed on or after September 16, 2012.The answer to the contested question of "should a toilet paper roll face over or under when on the holder?" is answered. The answer is it should face OVER. Shall submit the application for tentative approval of a PRD to the Allegheny County. What are the 3 common types of patents? They are utility, design, and plant patents. Shall submit the application for tentative approval of a PRD to the Allegheny County. Remote Attendance Requests. 4. Utility Patents – Toilet Paper Roll.