Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4590035 | High-hardness heat-resistant alloy | Yutaka Tomono, Kazuhiko Tanaka | 1986-05-20 |
| 4420335 | Materials for rolls | Tomio Takagi, Tadaomi Fujii, Kazuhiko Tanaka | 1983-12-13 |