Inventor · disambiguated record
Kiyofumi Hirai
Also filed as: HIRAI KIYOFUMI
7 granted patents·57 citations·filing 1988–1991
82Inventor score
Top patents by PatentIndex Score
7 records- 0185US5056630AWheel rim for a bicycleBRIDGESTONE CORP·Filed 1989·Granted Oct 15, 1991·41 cites·5 claims
- 0233US4931796ADigital-to-analog conversion circuitPIONEER ELECTRONIC CORP·Filed 1988·Granted Jun 5, 1990·4 cites·6 claims
- 0331US5163884AFriction-type stepless speed change deviceBRIDGESTONE CYCLE CO·Filed 1991·Granted Nov 17, 1992·4 cites·9 claims
- 0430US4934205AStepless speed change deviceBRIDGESTONE CYCLE CO·Filed 1988·Granted Jun 19, 1990·2 cites·10 claims
- 0529US5045037AFriction stepless speed change deviceBRIDGESTONE CYCLE CO·Filed 1990·Granted Sep 3, 1991·2 cites·1 claims
- 0629US5030183AFriction stepless speed change deviceBRIDGESTONE CYCLE CO·Filed 1990·Granted Jul 9, 1991·1 cites·1 claims
- 0726US4920827AStepless speed change deviceBRIDGESTONE CYCLE CO·Filed 1989·Granted May 1, 1990·3 cites·8 claims
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