Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5181243 | System and method for communications security protection | John M. Saltwick, William O. Sparks, Geoffrey W. Gates | 1993-01-19 |
| 5168519 | System and method for securing DTMF transmission | John M. Saltwick, William O. Sparks, Geoffrey W. Gates | 1992-12-01 |
| 5148478 | System and method for communications security protection | John M. Saltwick | 1992-09-15 |
| 4972469 | System and method for communications security protection | John M. Saltwick, William O. Sparks, Geoffrey W. Gates | 1990-11-20 |