Issued Patents All Time
Showing 101–104 of 104 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4663500 | Cryptographic system | Katsuhiro Nakamura | 1987-05-05 |
| 4658292 | Enciphering key distribution system for subscription TV broadcast or catv system | Katsuhiro Nakamura | 1987-04-14 |
| 4537247 | Heat pipe heat exchanger | Yasuhiro Fukaya, Michio Chikami | 1985-08-27 |
| 4405013 | Rotary type heat pipe heat exchanger | — | 1983-09-20 |