Inventor · disambiguated record
Masaharu Oka
Also filed as: OKA MASAHARU
16 granted patents·2 pending applications·238 citations·filing 1995–2022
91Inventor score
Files withNIPPON STEEL CORP8FUNAI ELECTRIC CO4NIPPON STEEL & SUMITOMO METAL CORP3AKAMATSU SATOSHI1KUMAGAI TATSUYA1
Top patents by PatentIndex Score
18 records- 0188US6027145AJoint for steel pipe having high galling resistance and surface treatment method thereofNIPPON STEEL CORP·Filed 1995·Granted Feb 22, 2000·164 cites·16 claims
- 0283US10815553B2Galvannealed steel sheet and production method thereofNIPPON STEEL & SUMITOMO METAL CORP·Filed 2016·Granted Oct 27, 2020·1 cites·9 claims
- 0382US6585799B1Cast steel piece and steel product excellent in forming characteristics and method for treatment of molted steel therefor and method for production thereofNIPPON STEEL CORP·Filed 2000·Granted Jul 1, 2003·15 cites·6 claims
- 0480US10907236B2Cold rolled steel sheet for drawn can and method for manufacturing sameNIPPON STEEL CORP·Filed 2018·Granted Feb 2, 2021·1 cites·12 claims
- 0577US7236216B2Liquid crystal moduleFUNAI ELECTRIC CO·Filed 2005·Granted Jun 26, 2007·5 cites·10 claims
- 0675US7426022B2Liquid crystal module brightness measurement apparatus and brightness measurement apparatusFUNAI ELECTRIC CO·Filed 2006·Granted Sep 16, 2008·8 cites·1 claims
- 0774US6918969B2Cast steel and steel material with excellent workability, method for processing molten steel therefor and method for manufacturing the cast steel and steel materialNIPPON STEEL CORP·Filed 2002·Granted Jul 19, 2005·9 cites·6 claims
- 0865US12221669B2Hot-rolled steel sheet, hot-dip coated steel sheet, and method for producing hot-rolled steel sheetNIPPON STEEL CORP·Filed 2022·Granted Feb 11, 2025·0 cites·4 claims
- 0965US9702031B2Bake-hardenable high-strength cold-rolled steel sheet and method of manufacturing the sameAKAMATSU SATOSHI·Filed 2011·Granted Jul 11, 2017·1 cites·6 claims
- 1064US8500924B2High-strength steel plate and producing method thereforKUMAGAI TATSUYA·Filed 2009·Granted Aug 6, 2013·1 cites·7 claims
- 1161US2024183013A1Surface-treated steel sheetNIPPON STEEL CORP·Filed 2022·Application pending·0 cites
- 1260US12319977B2Hot rolled steel sheet and production method thereofNIPPON STEEL CORP·Filed 2021·Granted Jun 3, 2025·0 cites·20 claims
- 1359US10294551B2High-strength low-specific-gravity steel sheet having superior spot weldabilityNIPPON STEEL & SUMITOMO METAL CORP·Filed 2014·Granted May 21, 2019·0 cites·2 claims
- 1457US8059214B2Direct-type backlight device and liquid crystal television apparatusOKA MASAHARU·Filed 2007·Granted Nov 15, 2011·2 cites·10 claims
- 1556US10336037B2Galvanized steel sheet and method for producing the sameNIPPON STEEL & SUMITOMO METAL CORP·Filed 2014·Granted Jul 2, 2019·0 cites·4 claims
- 1650US6176524B1Oil well pipe threaded jointNIPPON STEEL CORP·Filed 1996·Granted Jan 23, 2001·31 cites·10 claims
- 1744US7674004B2Planar light source deviceFUNAI ELECTRIC CO·Filed 2006·Granted Mar 9, 2010·0 cites·11 claims
- 1840US2005219861A1Backlight unit for a liquid crystal televisionFUNAI ELECTRIC CO·Filed 2005·Application pending·0 cites
Join the waitlist — get patent alerts
Get an alert when Masaharu 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 →