Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5439415 | Rolling stock ventilator and its control method | Haruo Hirikawa, Sumio Okuno, Morishige Hattori, Masakazu Matsumoto | 1995-08-08 |
| 5263894 | Methods and apparatus for ventilating carriages | Haruo Hirakawa, Hiroshi Higaki, Atsushi Ikio, Masakazu Matsumoto | 1993-11-23 |