Inventor · disambiguated record
Joji Oka
Also filed as: OKA JOJI
15 granted patents·262 citations·filing 1974–1990
94Inventor score
Files withNIPPON STEEL CORP9TAKEDA CHEMICAL INDUSTRIES LTD4SAKAI CHEMICAL INDUSTRY CO1TOA GOSEI CHEM IND1
Top patents by PatentIndex Score
15 records- 0184US4352899ACoating composition for metal-substrateSAKAI CHEMICAL INDUSTRY CO·Filed 1981·Granted Oct 5, 1982·39 cites·2 claims
- 0284US3975242AHorizontal rectilinear type metal-electroplating methodNIPPON STEEL CORP·Filed 1974·Granted Aug 17, 1976·34 cites·3 claims
- 0382US4079163AWeldable coated steel sheetNIPPON STEEL CORP·Filed 1975·Granted Mar 14, 1978·39 cites·18 claims
- 0472US3935035AAqueous solution and method for surface treatment of metalsNIPPON STEEL CORP·Filed 1974·Granted Jan 27, 1976·13 cites·11 claims
- 0570US4826895APaint composition for under coatingNIPPON STEEL CORP·Filed 1987·Granted May 2, 1989·17 cites·12 claims
- 0667US4524111AWeldable paint-coated steel sheets having excellent corrosion resistanceNIPPON STEEL CORP·Filed 1984·Granted Jun 18, 1985·24 cites·10 claims
- 0762US4705726AAnticorrosive weldable coated steelNIPPON STEEL CORP·Filed 1987·Granted Nov 10, 1987·19 cites·8 claims
- 0858US4880891AOne-can thermosetting resin compositions and precoated metalTAKEDA CHEMICAL INDUSTRIES LTD·Filed 1988·Granted Nov 14, 1989·11 cites·10 claims
- 0956US4880890AOne-can thermosetting resin compositions and precoated metalTAKEDA CHEMICAL INDUSTRIES LTD·Filed 1988·Granted Nov 14, 1989·10 cites·11 claims
- 1054US4898775APaint coated metal sheetsNIPPON STEEL CORP·Filed 1989·Granted Feb 6, 1990·15 cites·3 claims
- 1153US5166288ACoating composition for coating metal plateNIPPON STEEL CORP·Filed 1989·Granted Nov 24, 1992·13 cites·5 claims
- 1250US4251329AProcess for producing a highly corrosion resistant electroplated steel sheetNIPPON STEEL CORP·Filed 1979·Granted Feb 17, 1981·8 cites·12 claims
- 1346US4370387APre-coated steel sheets and process for production thereofTOA GOSEI CHEM IND·Filed 1981·Granted Jan 25, 1983·10 cites·18 claims
- 1441US4861672AOne-can heat-curable resin compositions and precoated metalTAKEDA CHEMICAL INDUSTRIES LTD·Filed 1988·Granted Aug 29, 1989·8 cites·5 claims
- 1531US5066757AOne-can heat-curable resin compositions and precoated metalTAKEDA CHEMICAL INDUSTRIES LTD·Filed 1990·Granted Nov 19, 1991·2 cites·6 claims
Join the waitlist — get patent alerts
Get an alert when Joji 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 →