John D. Toppen — 2 Patents at Clopay

John D. Toppen has been granted 2 US patents while listed as an inventor at Clopay. The first was granted in 1984 and the most recent in March 1994. John D. Toppen ranks #1,709,992 of 4,157,543 US inventors in our database (top 41.1%). Patent records list John D. Toppen in Cincinnati, OH, US.

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #	Title	Co-Inventors	Date	Approx Value ⓘ
5296184	Method of making an ultra soft cloth-like embossed plastic film having post-embossed stretched areas	Pai-Chuan Wu, Thomas R. Ryle, Robert M. Mortellite	1994-03-22
4427050	Window shade clutch assembly	—	1984-01-24	$186,000

John D. Toppen — 2 Patents

Issued Patents All Time

Patent Widget