Porsche 911 Automobile Patent Art Wall Hanging | Auto Mechanic Framed Print 16x20 Patent artwork and application submitted by Ferdinand Porsche to the US Patent & Trademark Office in 1964 Size is 16x20 Art is double-matted and presented in a high-quality wood & glass frame Makes a great auto mechanic racer gift! Available framed or unframed...can be PERSONALIZED, too!