Inventor · disambiguated record
Tetsuji Hirotsu
Also filed as: HIROTSU TETSUJI
3 granted patents·131 citations·filing 1986–1986
76Inventor score
Files withHITACHI LTD3
Top patents by PatentIndex Score
3 records- 0186US4799161AControl apparatus for maintaining traction in electric rolling stockHITACHI LTD·Filed 1986·Granted Jan 17, 1989·56 cites·16 claims
- 0285US4701682AControl system for maintaining traction of rolling stockHITACHI LTD·Filed 1986·Granted Oct 20, 1987·53 cites·8 claims
- 0360US4776283ATruck for railway vehicleHITACHI LTD·Filed 1986·Granted Oct 11, 1988·22 cites·3 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →