Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5233664 | Speaker system and method of controlling directivity thereof | Hirofumi Yanagawa, Keishi Saito | 1993-08-03 |
| 4404315 | Molding compositions and diaphragms, arm pipes and head shells molded therefrom | Tsunehiro Tsukagoshi, Etsuro Nemoto, Shinichi Yokozseki, Toshikazu Yoshino, Yasuyuki Arai +1 more | 1983-09-13 |
| 4366205 | Tone-arm elements | Tsunehiro Tsukagoshi, Shinichi Yokozeki, Masataka Uchidoi, Toshikazu Yoshino, Yasuyuki Arai | 1982-12-28 |
| 4362772 | Vibratory elements for audio equipment | Tsunehiro Tsukagoshi, Shinichi Yokozeki, Masataka Uchidoi, Toshikazu Yoshino, Yasuyuki Arai | 1982-12-07 |
| 4343376 | Vibratory elements for audio equipment | Tsunehiro Tsukagoshi, Shinichi Yokozeki, Masataka Uchidoi, Toshikazu Yoshino, Yasuyuki Arai | 1982-08-10 |