Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5493436 | Optical wave transmission | Yoshio Karasawa, Takashi Matsudo, Hisato Iwai | 1996-02-20 |
| 5173711 | Microstrip antenna for two-frequency separate-feeding type for circularly polarized waves | Kazunori Takeuchi, Masayuki Yasunaga | 1992-12-22 |
| 5170176 | Quadrifilar helix antenna | Masayuki Yasunaga | 1992-12-08 |
| 4853702 | Radio wave receiving system | Koji Yasukawa, Yoshio Karasawa | 1989-08-01 |
| 4400703 | Spiral array antenna | Yoshio Karasawa | 1983-08-23 |
| 4257048 | Antenna system to reduce fading caused by multipath transmission | Hiroshi Yokoi | 1981-03-17 |