Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4621288 | Reference time detecting circuit | Hisafumi Yamada, Junya Saito | 1986-11-04 |
| 4357631 | Ghost cancelling system | Kimitake Utsunomiya, Hisafumi Yamada | 1982-11-02 |
| 4344089 | Ghost cancelling system | Kimitake Utsunomiya, Hisafumi Yamada | 1982-08-10 |
| 4275420 | Television receiver with a ghost detector | Hisafumi Yamada, Masaharu Tokuhara | 1981-06-23 |