Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4356148 | Method for preventing corrosion and hydrogen embrittlement of tantalum-made equipment handling hot concentrated sulphuric acid therein | Naohiko Kagawa, Katsumi Yamamoto, Rin Sasano, Takao Kusakabe | 1982-10-26 |