22 Utility Patents
#20 in Kusatsu
#30,949 in Japan
#141,009 in the World
Forward Citations = 200
Company Filing History:
Ishihara Sangyo Kaisha, Ltd.

where one patent can have more than one assignee
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#20 in Kusatsu
#30,949 in Japan
#141,009 in the World
Company Filing History:

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