Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5272751 | Pay television | Harumasa Kajita, Noriyuki Kawamoto | 1993-12-21 |
| 5230019 | Key signal conversion device for CATV system | Toyokazu Yanagimichi, Harumasa Kajita, Tetsuo Kariya, Toshikazu Wakabayashi, Ichiro Kawashima +1 more | 1993-07-20 |
| 5161187 | Cable television system | Harumasa Kajita, Toyokazu Yanagimichi, Tetsuo Kariya, Toshikazu Wakabayashi, Ichiro Kawashima +1 more | 1992-11-03 |