Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9425473 | Fuel cell system and method of operating fuel cell system | Yoshiaki Naganuma, Keigo Suematsu, Tomotaka Ishikawa | 2016-08-23 |
| 9105889 | Method and apparatus for determining humidity states of individual cells in a fuel cell, method and apparatus for controlling humidity states of individual cells in a fuel cell, and a fuel cell system | Keigo Suematsu, Tomotaka Ishikawa, Yoshiaki Naganuma | 2015-08-11 |
| 5513857 | Piston sealing ring having interlocking ends | Tetsumi Watanabe, Yutaka Momose, Noboru Ohtani | 1996-05-07 |
| 5199722 | Seal assembly for stirling engine | Yoshiaki Wada, Tunesaku Itaba, Koichiro Kasahara, Yutaka Momose, Tetsumi Watanabe | 1993-04-06 |
| 5085054 | Sealing mechanism in Stirling engine | Tomokimi Mizuno, Tetsumi Watanabe | 1992-02-04 |
| 5056419 | Sealing device for a piston rod of a stirling engine | Tetsumi Watanabe, Tomokimi Mizuno, Yutaka Momose | 1991-10-15 |