Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4870439 | Focal length varying device for camera | Takayuki Tsuboi, Isao Nakazawa, Hiroshi Maeno | 1989-09-26 |
YS
Yasuhiko Shiomi
Overall (1989): #41,764 of 140,708Top 30%
1
Patents 1989