Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4881987 | Process for direct softening heat treatment of rolled wire rods | Susumu Kanbara, Kenji Aihara, Yoshio Kawashima, Tadashi Sawada, Shinji Okuda +1 more | 1989-11-21 |
| 4834345 | Process and apparatus for direct softening heat treatment of rolled wire rods | Susumu Kanbara, Kenji Aihara, Yoshio Kawashima, Tadashi Sawada, Shinji Okuda +1 more | 1989-05-30 |
| 4823577 | Method of feeding material to hot forging machine | Yoshio Kawashima, Shunji Ogata, Masaaki Yokoyama, Tsuneo Yamada, Tsutomu Kuno +5 more | 1989-04-25 |