Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D302430 | Speaker | Mitsukatsu Nagashima | 1989-07-25 |
| 4809087 | Apparatus for recording a discriminative signal | Yasuharu Shimeki, Masamitsu Ohtsu, Nobuyoshi Kihara | 1989-02-28 |
HM
Hiroshi Matsushima
Overall (1989): #25,813 of 140,708Top 20%
2
Patents 1989