Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4885937 | Flow sensor | Nobuyuki Tanaka, Yasuhiko Inami, Masaya Hijikigawa | 1989-12-12 |
| 4857920 | Combined traffic signal with stacked EL elements | Masaru Yoshida, Shigeo Nakajima | 1989-08-15 |