Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4528664 | Call progress signal monitor and method for telephone systems | Chao-Jan Cheng, John Donak | 1985-07-09 |
SA
Samir E. Ahad
Overall (All Time): #4,017,992 of 4,157,543Top 100%
1
Patents All Time