Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5552940 | Method and apparatus for digital signal recording and/or reproduction | Masuo Umemoto, Hirotake Ishii, Yoshizumi Eto | 1996-09-03 |
| 5247401 | Replay equalization circuit in digital image recorder | Masuo Umemoto, Yoshizumi Eto | 1993-09-21 |