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Type indicator
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Patent number 3,933,235
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Issue date Jan 20, 1976
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Vincent Chan
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B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
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3916785
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Patent number 3,916,785
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Issue date Nov 4, 1975
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G06 - COMPUTING CALCULATING COUNTING
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3901369
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Patent number 3,901,369
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Issue date Aug 26, 1975
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B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
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3783778
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Patent number 3,783,778
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Issue date Jan 8, 1974
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B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
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3776130
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Patent number 3,776,130
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Issue date Dec 4, 1973
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B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
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3763986
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Patent number 3,763,986
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Issue date Oct 9, 1973
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B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
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3753482
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Patent number 3,753,482
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Issue date Aug 21, 1973
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B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
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3348770
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Patent number 3,348,770
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Issue date Oct 24, 1967
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B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
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3182907
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Patent number 3,182,907
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Issue date May 11, 1965
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B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
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3063625
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Patent number 3,063,625
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Issue date Nov 13, 1962
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B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
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2458137
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Patent number 2,458,137
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Issue date Jan 4, 1949
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B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
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2168824
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Patent number 2,168,824
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Issue date Aug 8, 1939
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B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS