Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4870349 | Digital level indicating device | Shizuo Kakiuchi | 1989-09-26 |
| 4855741 | Logarithmic digital level display device | Shizuo Kakiuchi | 1989-08-08 |
HI
Hiroshi Iizuka
Overall (1989): #25,980 of 140,708Top 20%
2
Patents 1989