Issued Patents 1994
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5367506 | Sound collecting system and sound reproducing system | Yuji Yamada | 1994-11-22 |
| 5276740 | Earphone device | Hiroyuki Sogawa, Yasuhiro Iida, Akira Kimura | 1994-01-04 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5367506 | Sound collecting system and sound reproducing system | Yuji Yamada | 1994-11-22 |
| 5276740 | Earphone device | Hiroyuki Sogawa, Yasuhiro Iida, Akira Kimura | 1994-01-04 |