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Gerald A. Gieseker
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Arvada, CO, US
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last 30 patents
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Patent Grant
Maze-type locking device
Patent number
5,148,692
Issue date
Sep 22, 1992
Gerald A. Gieseker
A63 - SPORTS GAMES AMUSEMENTS
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Patent Grant
Maze device
Patent number
4,974,848
Issue date
Dec 4, 1990
Gerald A. Gieseker
A63 - SPORTS GAMES AMUSEMENTS