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Yuichi Yamakawa
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Tokyo, JP
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last 30 patents
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Patent Grant
Wire-dot printer in which printing modes can be changed over from o...
Patent number
5,320,441
Issue date
Jun 14, 1994
Seikosha Co., Ltd.
Yuichi Yamakawa
B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
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Patent Grant
Printer head with adjustable magnetic reluctance
Patent number
4,934,848
Issue date
Jun 19, 1990
Seikosha Co., Ltd.
Mikio Hayashi
B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS