Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5830414 | Air cleaning filter | Tsutomu Ishii, Seiichi Takizawa, Tetsuo Shimamura, Michinori Hashimoto, Fumio Karibe | 1998-11-03 |
| 5462693 | Air purifying agent and a process for producing same | Seikichi Tabei, Michinori Hashimoto | 1995-10-31 |
| 5346876 | Air purifying agent and a process for producing same | Seikichi Tabei, Michinori Hashimoto | 1994-09-13 |