Ralf Holzhauer — 2 Patents at Otis Elevator

Ralf Holzhauer has been granted 2 US patents while listed as an inventor at Otis Elevator. The first was granted in 1986 and the most recent in October 1989. Ralf Holzhauer ranks #1,709,992 of 4,157,543 US inventors in our database (top 41.1%). Patent records list Ralf Holzhauer in Stadthagen, DE.

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #	Title	Co-Inventors	Date	Approx Value ⓘ
4875568	Escalator handrail drive	Dietrich E. Hermann	1989-10-24	$4,972,000
4619355	Escalator handrail entry safety switch actuator	Willy Adrian	1986-10-28	$29,753,000

Ralf Holzhauer — 2 Patents

Issued Patents All Time

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