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Calvin Duke Martini
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Riverview, New Brunswick, CA
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last 30 patents
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Patent Grant
Ticket dispensing mechanism
Patent number
6,652,173
Issue date
Nov 25, 2003
Spielo Manufacturing Incorporated
Calvin Duke Martini
Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC
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Patent Grant
Ticket dispenser
Patent number
6,162,159
Issue date
Dec 19, 2000
Calvin Duke Martini
G07 - CHECKING-DEVICES