Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6419770 | Cold-warm working and heat treatment method of high carbon-high alloy group steel | Shu Miyashita, Masami Tanaka, Saburo Sugiura | 2002-07-16 |
| 5753179 | Steels for exhaust valves having improved fatigue strength at high temperature, corrosion resistance at room and higher temperatures and oxidation resistance | Akihiro Hamada, Shinichi Umino | 1998-05-19 |