Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4878049 | Information transmission system for railway vehicles | Hajime Ochiai | 1989-10-31 |
| 4825189 | Train monitoring equipment | Hidetoshi Honma | 1989-04-25 |
| 4817019 | Inspecting apparatus for measuring sensors mounted on train | — | 1989-03-28 |