Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4884254 | Time display device | Shoichi Kawai, Masayuki Konishi | 1989-11-28 |
CK
Chieji Katoh
Overall (1989): #126,252 of 140,708Top 90%
1
Patents 1989