Inventor · disambiguated record

Roy Isamu Yamamota

Also filed as: YAMAMOTA ROY ISAMU

1 granted patent·218 citations·filing 1992–1992

56Inventor score

Technology areasC10N

Files withETHYL CORP1

Top patents by PatentIndex Score

1 record

0194US6117825APolyisobutylene succinimide and ethylene-propylene succinimide synergistic additives for lubricating oils compositionsETHYL CORP·Filed 1992·Granted Sep 12, 2000·218 cites·23 claims

Join the waitlist — get patent alerts

Get an alert when Roy Isamu Yamamota 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 →