Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4262283 | System for transmitting alarm information over telephone lines | Ian C. Chamberlain, Michael J. Barton | 1981-04-14 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4262283 | System for transmitting alarm information over telephone lines | Ian C. Chamberlain, Michael J. Barton | 1981-04-14 |