Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5263894 | Methods and apparatus for ventilating carriages | Haruo Hirakawa, Shinichiroo Ishikawa, Hiroshi Higaki, Masakazu Matsumoto | 1993-11-23 |
| 5137490 | Ventilating equipment for railway rolling stock and operating method thereof | Shinichirou Ishikawa, Toshiharu Matsuda, Haruo Hirakawa, Hiroshi Higaki, Masakazu Matsumoto | 1992-08-11 |