Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4426159 | Electronic time keeping device | Kazumitu Kosaka, Yukio Kido, Shigeru Katoh | 1984-01-17 |
HT
Hitoshi Tsutsui
Overall (All Time): #4,028,066 of 4,157,543Top 100%
1
Patents All Time