Issued Patents 1997
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5661777 | Loop detection signal issuing circuit in subscriber circuit having on-hook transmission facility | — | 1997-08-26 |
YY
Yuzo Yamamoto
Overall (1997): #53,595 of 185,788Top 30%
1
Patents 1997