Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4550797 | Loudspeaker diaphragm made of a molded, sintered ceramic body | Kiyoaki Suzuki, Hidetsugu Suzuki, Katsuhiro Onuki, Yoshiaki Fukuda, Takeshi Sato | 1985-11-05 |
| 4308425 | Variable-directivity microphone device | Chikahide Momose, Atushi Yumoto, Naotaka Miyaji, Hiroshi Ogawa | 1981-12-29 |