Issued Patents 1994
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5357577 | Vacuum tube microphone apparatus | Tomohiro Waji, Kazumasa Takahashi, Kiichi Yoshida, Osamu Kohno, Tohru Enokuma +1 more | 1994-10-18 |
| 5319476 | Multiply recorded hologram for security | Shigehiko Tahara | 1994-06-07 |