Inventor · disambiguated record
Hirotomo Hirai
Also filed as: HIRAI HIROTOMO · YAGI KENJIRO
4 granted patents·141 citations·filing 1974–1978
81Inventor score
Files withSEIKO INSTR & ELECTRONICS4
Top patents by PatentIndex Score
4 records- 0188US4017155ALiquid crystal display deviceSEIKO INSTR & ELECTRONICS·Filed 1974·Granted Apr 12, 1977·41 cites·7 claims
- 0286US3984176AReflective plates for a liquid crystal display deviceSEIKO INSTR & ELECTRONICS·Filed 1975·Granted Oct 5, 1976·47 cites·10 claims
- 0382US3978296ASwitching system for an electronic timepieceSEIKO INSTR & ELECTRONICS·Filed 1975·Granted Aug 31, 1976·24 cites·2 claims
- 0471US4204205AElectronic display deviceSEIKO INSTR & ELECTRONICS·Filed 1978·Granted May 20, 1980·29 cites·7 claims
Join the waitlist — get patent alerts
Get an alert when Hirotomo Hirai files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →