Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4872199 | Battery-feed circuit for exchange | Shigeru Kawami, Takashi Tabu, Nobuyuki Masuda | 1989-10-03 |
SS
Shigeo Sano
Overall (1989): #56,955 of 140,708Top 45%
1
Patents 1989