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John M. Hennessey
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Oakland, NJ, US
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last 30 patents
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Patent Grant
Computer controlled winch assembly for stage
Patent number
6,385,493
Issue date
May 7, 2002
Production Resource Group L.L.C.
John M. Hennessey
B66 - HOISTING LIFTING HAULING
Information
Patent Grant
Computer controlled movement of stage effects and stage installatio...
Patent number
5,920,476
Issue date
Jul 6, 1999
John M. Hennessey
A63 - SPORTS GAMES AMUSEMENTS