Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7121116 | Method and device for producing oxygen | Mikihiko Matsuda, Keishi Ohshima | 2006-10-17 |
| 6691520 | Pulse tube cryocooler | Yukio Yasukawa | 2004-02-17 |
| 5149599 | Method of stopping the operation of phosphoric acid type fuel cell | — | 1992-09-22 |
| 5041344 | Fuel cell cooling device | Toshio Hirota, Osamu Yamamoto, Kaoru Kondou, Takashi Ujile | 1991-08-20 |
| 4963443 | Fuel cell system and the method for operating the same | — | 1990-10-16 |
| 4623596 | Cell stack for fuel cells | — | 1986-11-18 |