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Hiroyuki Yoshikawa
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Numazu, JP
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last 30 patents
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Patent Grant
Method and apparatus for producing toner for electrophotography
Patent number
7,011,921
Issue date
Mar 14, 2006
Ricoh Company, Ltd.
Junya Koeda
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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Patent Grant
Supersonic jet crusher of collisional type
Patent number
5,358,188
Issue date
Oct 25, 1994
Ricoh Company, Ltd.
Nobuyasu Makino
B02 - CRUSHING, PULVERISING, OR DISINTEGRATING PREPARATORY TREATMENT OF GRAIN...