Issued Patents 1997
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5684881 | Sound field and sound image control apparatus and method | Mitsuhiko Serikawa, Ryou Tagami, Akihisa Kawamura, Masaharu Matsumoto, Hiroko Numazu | 1997-11-04 |
| 5668885 | Low frequency audio conversion circuit | — | 1997-09-16 |
| 5617478 | Sound reproduction system and a sound reproduction method | Ryou Tagami, Takeshi Norimatsu, Masaharu Matsumoto, Mitsuhiko Serikawa, Akihisa Kawamura +1 more | 1997-04-01 |