Inventor · disambiguated record
Hirokazu Oka
Also filed as: OKA HIROKAZU
3 granted patents·53 citations·filing 1978–1990
68Inventor score
Top patents by PatentIndex Score
3 records- 0175US5071613AMethod for producing polyurethane type compositeNIPPON POLYURETHANE KOGYO KK·Filed 1990·Granted Dec 10, 1991·27 cites·5 claims
- 0273US5071939AMethod for preparing polyisocyanurate compositeNIPPON POLYURETHANE KOGYO KK·Filed 1990·Granted Dec 10, 1991·26 cites·18 claims
- 0324US4217056AType action for a power-driven typewriterSILVER SEIKO·Filed 1978·Granted Aug 12, 1980·0 cites·7 claims
Join the waitlist — get patent alerts
Get an alert when Hirokazu Oka 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 →