Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4811257 | Electronic calculator having means for directly inputting variables into a prestored and displayed equation | Akira Natsuhara | 1989-03-07 |
TS
Toshihiko Sumitani
Overall (1989): #48,089 of 140,708Top 35%
1
Patents 1989