Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5448219 | Indicating apparatus from preventing vehicles from colliding with each other as they pass | Takashi Yoshikawa | 1995-09-05 |
| 5177471 | Landslide detecting apparatus having improved optical unit | Takashi Yoshikawa | 1993-01-05 |