Inventor · disambiguated record
Ryoichi Naganuma
Also filed as: NAGANUMA RYOICHI
3 granted patents·39 citations·filing 1993–1999
68Inventor score
Files withHITACHI LTD3
Top patents by PatentIndex Score
3 records- 0182US5453972AOptical disk apparatusHITACHI LTD·Filed 1993·Granted Sep 26, 1995·34 cites·4 claims
- 0231US5913747AHydraulic control apparatus for an automatic transmission of a vehicleHITACHI LTD·Filed 1997·Granted Jun 22, 1999·3 cites·9 claims
- 0330US6190285B1Hydraulic control apparatus for an automatic transmission of a vehicleHITACHI LTD·Filed 1999·Granted Feb 20, 2001·2 cites·4 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →