Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4869701 | Electrical educational toy | Hiroyuki Kawai, Fujiyo Mandai | 1989-09-26 |
| 4858508 | Electronic musical instrument with tone-sustaining controller | — | 1989-08-22 |
TS
Takeo Shibukawa
Overall (1989): #14,844 of 140,708Top 15%
2
Patents 1989