David J. Schonberg — 4 Patents at Unknown

David J. Schonberg has been granted 4 US patents while listed as an inventor at Unknown. The first was granted in 1990 and the most recent in December 2005. David J. Schonberg ranks #1,080,739 of 4,157,543 US inventors in our database (top 26.0%). Patent records list David J. Schonberg in Alexandria, MN, US.

Issued Patents All Time

Showing 1–4 of 4 patents

Patent #	Title	Co-Inventors	Date
6973944	Collapsible apparatus for recovering and dispensing lightweight objects	Keith Anderson	2005-12-13
5741093	Apparatus for collecting lightweight objects	Neal E. Fosdick	1998-04-21
5069325	Coin operated shopping cart rental system	—	1991-12-03
4967912	Bypass mechanism for magnetic separator	—	1990-11-06

David J. Schonberg — 4 Patents

Issued Patents All Time

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