Assignee
HIRAI KOSAKU KK
JP·3 granted patents·10 citations·filing 1993–1998
Top patents by PatentIndex Score
3 records- 0150US5755133AMold for fabricating a screw washer and a screw washerHIRAI KOSAKU KK·Filed 1996·Granted May 26, 1998·7 cites·2 claims
- 0232US5980179AScrew washerHIRAI KOSAKU KK·Filed 1998·Granted Nov 9, 1999·2 cites·1 claims
- 0330US5626521AMethod of manufacturing a screw washerHIRAI KOSAKU KK·Filed 1993·Granted May 6, 1997·1 cites·4 claims
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