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Fluidless masters
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Patent number 4,257,329
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Issue date Mar 24, 1981
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The Mazer Corporation
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Irving Panken
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B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
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Hectograph products and process
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Patent number 4,042,401
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Issue date Aug 16, 1977
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Columbia Ribbon and Carbon Manufacturing Co., Inc.
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Douglas A. Newman
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B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
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Thermorecording
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Patent number 4,004,924
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Issue date Jan 25, 1977
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Agfa-Gevaert N.V.
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Marcel Nicolas Vrancken
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B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
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Continuous copying method
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Patent number 3,989,569
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Issue date Nov 2, 1976
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Columbia Ribbon and Carbon Manufacturing Co., Inc.
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Douglas A. Newman
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B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
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3874984
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Patent number 3,874,984
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Issue date Apr 1, 1975
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B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
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3839956
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Patent number 3,839,956
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Issue date Oct 8, 1974
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B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
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3793025
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Patent number 3,793,025
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Issue date Feb 19, 1974
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B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
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3767450
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Patent number 3,767,450
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Issue date Oct 23, 1973
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B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
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3763779
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Patent number 3,763,779
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Issue date Oct 9, 1973
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B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS