Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5938954 | Submerged laser beam irradiation equipment | Tsutomu Onuma, Toshimi Matsumoto, Akira Onuma, Mitsuo Nakamura, Yasumasa Tamai +4 more | 1999-08-17 |
| 4505232 | Boiler tube | Kenichi Usami, Seishin Kirihara, Hiroyuki Doi, Masayuki Sukekawa, Yasuhide Sakaguchi | 1985-03-19 |