John W. Koshak

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Alameda, CA, US

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Patents Grantslast 30 patents

Information Patent Grant
Jack arrestor
- Patent number 6,371,254
- Issue date Apr 16, 2002
- John W. Koshak
- B66 - HOISTING LIFTING HAULING

Patents Applicationslast 30 patents

Information Patent Application
Hydraulic elevator safety brake
- Publication number 20020112929
- Publication date Aug 22, 2002
- John W. Koshak
- B66 - HOISTING LIFTING HAULING