Inventor · disambiguated record
Sadahiko Niwa
Also filed as: NIWA SADAHIKO
3 granted patents·48 citations·filing 1980–1987
70Inventor score
Files withHITACHI LTD3
Top patents by PatentIndex Score
3 records- 0170US4812730AVariable-speed generator/motor systemHITACHI LTD·Filed 1987·Granted Mar 14, 1989·28 cites·8 claims
- 0262US4364032AMethod and apparatus for diagnosing local overheating in a rotary electric machineHITACHI LTD·Filed 1980·Granted Dec 14, 1982·18 cites·6 claims
- 0323US4373376AMethod and apparatus for diagnosing overheating of an electric machineHITACHI LTD·Filed 1980·Granted Feb 15, 1983·2 cites·13 claims
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →