Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5369697 | Method and apparatus for automatically switching between pulse code and DTMF signals generated by a telephone | John P. Murray, III, David F. Hemmings | 1994-11-29 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5369697 | Method and apparatus for automatically switching between pulse code and DTMF signals generated by a telephone | John P. Murray, III, David F. Hemmings | 1994-11-29 |