Issued Patents 1997
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5592544 | DTMF signal judging apparatus | Yasumoto Murata, Shuichi Yoshikawa, Masahiko Watanabe | 1997-01-07 |
MI
Michio Ikeuchi
Overall (1997): #103,735 of 185,788Top 60%
1
Patents 1997