Inventor · disambiguated record
Tsutomu Oka
Also filed as: OKA TSUTOMU
5 granted patents·145 citations·filing 1986–1994
82Inventor score
Top patents by PatentIndex Score
5 records- 0195US4889170AHigh strength Ti alloy material having improved workability and process for producing the sameMITSUBISHI METAL CORP·Filed 1986·Granted Dec 26, 1989·77 cites·4 claims
- 0290US5119865ACu-alloy mold for use in centrifugal casting of ti or ti alloy and centrifugal-casting method using the moldMITSUBISHI MATERIALS CORP·Filed 1991·Granted Jun 9, 1992·32 cites·15 claims
- 0367US5495837AEngine valve having improved high-temperature wear resistanceMITSUBISHI MATERIALS CORP·Filed 1994·Granted Mar 5, 1996·24 cites·26 claims
- 0456US4681627AProcess for preparing an ingot from metal scrapMITSUBISHI METAL CORP·Filed 1986·Granted Jul 21, 1987·10 cites·30 claims
- 0523US5496986AApparatus for applying hard facing to valveMITSUBISHI MATERIALS CORP·Filed 1994·Granted Mar 5, 1996·2 cites·5 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →