Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6514631 | Heating furnace tube and method of manufacturing the same | Katsumi Yamamoto, Takeo Murata, Kenji Sato, Toshikazu Nakamura, Muneyasu Ichimura +2 more | 2003-02-04 |
| 4356148 | Method for preventing corrosion and hydrogen embrittlement of tantalum-made equipment handling hot concentrated sulphuric acid therein | Naohiko Kagawa, Katsumi Yamamoto, Takao Kusakabe, Yasuhiro Moriya | 1982-10-26 |