Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4540674 | Silicon nitride composite refractories | Akira Watanabe, Yoshimitsu Takeuchi, Tetsusaburo Isono, Kenji Fujiwara | 1985-09-10 |
| 4227925 | Heat-resistant alloy for welded structures | Yuzo Hosoi, Yutaka Tsuchida, Shozo Sekino, Mizuo Sakakihara, Shoji Murota | 1980-10-14 |
| 4216020 | Carbonaceous bricks and the method for producing the same | Akira Watanabe, Tetsuya Sugimoto, Yukio Kusaka, Takanori Shimizu | 1980-08-05 |