Issued Patents All Time
Showing 1–16 of 16 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7293089 | Site evaluation system and site evaluation program storage medium | Takeshi Kumazawa | 2007-11-06 |
| 7277939 | Site evaluation system and site evaluation program storage medium | Takeshi Kumazawa | 2007-10-02 |
| 7222171 | Site evaluation system and site evaluation program storage medium | Takeshi Kumazawa | 2007-05-22 |
| 5944937 | Chemically resistant sheet and method for making | — | 1999-08-31 |
| 5688580 | Interior material for tunnels and tunnel interior construction | — | 1997-11-18 |
| 5556676 | Tunnel interior construction | — | 1996-09-17 |
| 5522522 | Tank lined with a chemical-resistant sheet | — | 1996-06-04 |
| 4749031 | Heat exchanging device having baffles and fluorocarbon tubes | — | 1988-06-07 |
| 4671343 | Heat exchanger having spirally wound tubes | — | 1987-06-09 |
| D280546 | Heat exchanger | — | 1985-09-10 |
| D280544 | Heat exchanger | — | 1985-09-10 |
| D280545 | Heat exchanger | — | 1985-09-10 |
| D280547 | Heat exchanger | — | 1985-09-10 |
| 4538678 | Heat exchanging device | — | 1985-09-03 |
| 4476838 | Exhaust gas suppressor | — | 1984-10-16 |
| 4362143 | Exhaust gas suppressor | — | 1982-12-07 |