Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4533792 | Circuit for switching between ring signal and message waiting signal without bell tap | Anthony S. Rehak, Howard Sinberg | 1985-08-06 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4533792 | Circuit for switching between ring signal and message waiting signal without bell tap | Anthony S. Rehak, Howard Sinberg | 1985-08-06 |