Inventor · disambiguated record
Hajime Esaka
Also filed as: ESAKA HAJIME
2 granted patents·10 citations·filing 1985–1985
55Inventor score
Technology areasC22C
Files withKOBE STEEL LTD2
Top patents by PatentIndex Score
2 records- 0136US4671930AHigh hardness and high toughness nitriding powder metallurgical high-speed steelKOBE STEEL LTD·Filed 1985·Granted Jun 9, 1987·5 cites·4 claims
- 0234US4599109AHigh hardness and high toughness nitriding powder metallurgical high-speed steelKOBE STEEL LTD·Filed 1985·Granted Jul 8, 1986·5 cites·4 claims
Join the waitlist — get patent alerts
Get an alert when Hajime Esaka 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 →