Inventor · disambiguated record
Hatsuhiko Oikawa
Also filed as: OIKAWA HATSUHIKO
12 granted patents·132 citations·filing 1987–2014
90Inventor score
Files withNIPPON STEEL & SUMITOMO METAL CORP7TOYODA CHUO KENKYUSHO KK2NIPPON STEEL CORP1NIWA TOSHIYUKI1OIKAWA HATSUHIKO1
Top patents by PatentIndex Score
12 records- 0191US10040145B2Spot welding method of high-strength steel sheets excellent in joint strengthNIPPON STEEL & SUMITOMO METAL CORP·Filed 2012·Granted Aug 7, 2018·10 cites·12 claims
- 0289US10081071B2Arc spot welded joint and manufacturing method thereofNIPPON STEEL & SUMITOMO METAL CORP·Filed 2014·Granted Sep 25, 2018·4 cites·5 claims
- 0389US9970116B2Al-plated steel sheet used for hot pressing and method for manufacturing Al-plated steel sheet used for hot pressingNIPPON STEEL & SUMITOMO METAL CORP·Filed 2014·Granted May 15, 2018·4 cites·11 claims
- 0487US5783794AMethod and material for resistance welding steel-base metal sheet to aluminum-base metal sheetNIPPON STEEL CORP·Filed 1997·Granted Jul 21, 1998·83 cites·5 claims
- 0585US10081073B2Spot welded jointNIPPON STEEL & SUMITOMO METAL CORP·Filed 2013·Granted Sep 25, 2018·3 cites·3 claims
- 0684US8962149B2Spot welded jointOIKAWA HATSUHIKO·Filed 2010·Granted Feb 24, 2015·7 cites·8 claims
- 0782US10406627B2Resistance spot welding methodNIPPON STEEL & SUMITOMO METAL CORP·Filed 2014·Granted Sep 10, 2019·4 cites·18 claims
- 0880US9610648B2Spot welded joint and spot welding methodNIPPON STEEL & SUMITOMO METAL CORP·Filed 2014·Granted Apr 4, 2017·3 cites·14 claims
- 0973US10265797B2Resistance spot welding methodNIPPON STEEL & SUMITOMO METAL CORP·Filed 2014·Granted Apr 23, 2019·2 cites·11 claims
- 1049US4794044AMethod for surface treatmentTOYODA CHUO KENKYUSHO KK·Filed 1987·Granted Dec 27, 1988·10 cites·21 claims
- 1146US8979104B2Front body structureNIWA TOSHIYUKI·Filed 2012·Granted Mar 17, 2015·1 cites·3 claims
- 1229US4778540AMethod for surface treatment and treating material thereforTOYODA CHUO KENKYUSHO KK·Filed 1987·Granted Oct 18, 1988·1 cites·11 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →