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Electro-coagulation printer
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Patent number 6,348,938
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Issue date Feb 19, 2002
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Yamaha Corporation
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Kunimasa Muroi
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B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
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3823022
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Patent number 3,823,022
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Issue date Jul 9, 1974
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G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
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3632364
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Patent number 3,632,364
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Issue date Jan 4, 1972
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B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
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3386379
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Patent number 3,386,379
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Issue date Jun 4, 1968
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B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
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3336596
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Patent number 3,336,596
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Issue date Aug 15, 1967
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B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
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3332347
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Patent number 3,332,347
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Issue date Jul 25, 1967
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B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS