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Wrist or pocket watch
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Patent number 6,026,061
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Issue date Feb 15, 2000
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Wolfgang Heck
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A63 - SPORTS GAMES AMUSEMENTS
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3526087
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Patent number 3,526,087
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Issue date Sep 1, 1970
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G04 - HOROLOGY
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3357703
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Patent number 3,357,703
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Issue date Dec 12, 1967
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G07 - CHECKING-DEVICES
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2539025
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Patent number 2,539,025
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Issue date Jan 23, 1951
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G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
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2525710
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Patent number 2,525,710
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Issue date Oct 10, 1950
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G04 - HOROLOGY