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3872789
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Patent number 3,872,789
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Issue date Mar 25, 1975
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B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
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3788214
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Patent number 3,788,214
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Issue date Jan 29, 1974
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B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
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3721186
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Patent number 3,721,186
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Issue date Mar 20, 1973
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B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
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3309987
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Patent number 3,309,987
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Issue date Mar 21, 1967
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B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS