Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4878400 | Bias ratio levelling apparatus of a worm gear type differential | Junzo Kimura | 1989-11-07 |
| 4821946 | Soldering method | Seiichi Abe, Kenji Fujita | 1989-04-18 |
TN
Toshiyuki Nakao
Hitachi: 1 patents #814 of 2,935Top 30%
Overall (1989): #13,999 of 140,708Top 10%
2
Patents 1989