Douglas Richards — 3 Patents at Otis Elevator

Douglas Richards has been granted 3 US patents while listed as an inventor at Otis Elevator. The first was granted in 1991 and the most recent in August 2001. Douglas Richards ranks #1,328,092 of 4,157,543 US inventors in our database (top 31.9%). Patent records list Douglas Richards in Bexleyheath, KS, GB.

Issued Patents All Time

Showing 1–3 of 3 patents

Patent #	Title	Co-Inventors	Date	Approx Value ⓘ
6279897	Sheet separator dam	—	2001-08-28	$26,730,000
5065843	Method for installing elevator system components	—	1991-11-19	$10,591,000
5033586	Construction elevator assembly	Robert C. Anderson, Paul Bennett	1991-07-23	$4,238,000

Douglas Richards — 3 Patents

Issued Patents All Time

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