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3861306
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Patent number 3,861,306
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Issue date Jan 21, 1975
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B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
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3750573
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Patent number 3,750,573
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Issue date Aug 7, 1973
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B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
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3463082
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Patent number 3,463,082
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Issue date Aug 26, 1969
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B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
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3153380
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Patent number 3,153,380
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Issue date Oct 20, 1964
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B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS