Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4884254 | Time display device | Shoichi Kawai, Chieji Katoh | 1989-11-28 |
MK
Masayuki Konishi
Overall (1989): #80,487 of 140,708Top 60%
1
Patents 1989