Inventor · disambiguated record

Hiroo Usui

Also filed as: USUI HIROO

2 granted patents·64 citations·filing 1976–1980

66Inventor score

Technology areasH10P

Files withHITACHI LTD2

Top patents by PatentIndex Score

2 records

0175US4016007AMethod for fabricating a silicon device utilizing ion-implantation and selective oxidationHITACHI LTD·Filed 1976·Granted Apr 5, 1977·31 cites·9 claims
0270US4394191AStacked polycrystalline silicon film of high and low conductivity layersHITACHI LTD·Filed 1980·Granted Jul 19, 1983·33 cites·10 claims

Join the waitlist — get patent alerts

Get an alert when Hiroo Usui 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 →