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Master plate making printing device
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Patent number 5,553,539
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Issue date Sep 10, 1996
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Riso Kagaku Corporation
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Takanori Hasegawa
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B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
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Motor-type ink sensor
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Patent number 5,533,449
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Issue date Jul 9, 1996
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Riso Kagaku Corporation
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Takanori Hasegawa
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B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
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Stencil printing method
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Patent number 5,450,789
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Issue date Sep 19, 1995
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Riso Kagaku Corporation
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Takanori Hasegawa
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B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
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Pressure printing device
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Patent number 5,337,662
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Issue date Aug 16, 1994
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Riso Kagaku Corporation
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Takanori Hasegawa
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B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
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Disposal device for paper documents
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Patent number 5,188,301
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Issue date Feb 23, 1993
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Riso Kagaku Corporation
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Takanori Hasegawa
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B02 - CRUSHING, PULVERISING, OR DISINTEGRATING PREPARATORY TREATMENT OF GRAIN...
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Mimeographic printing machine
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Patent number 5,095,816
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Issue date Mar 17, 1992
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Riso Kagaku
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Takanori Hasegawa
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B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
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Image processing apparatus
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Patent number 5,010,420
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Issue date Apr 23, 1991
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Riso Kagaku Corporation
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Takanori Hasegawa
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G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
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