Issued Patents All Time
Showing 126–130 of 130 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4405942 | Method and system for secure transmission and reception of video information, particularly for television | Robert S. Block | 1983-09-20 |
| 4387973 | Apparatus for maintaining clean optical surfaces in process environments | — | 1983-06-14 |
| 4335379 | Method and system for providing an audible alarm responsive to sensed conditions | — | 1982-06-15 |
| 4225884 | Method and system for subscription television billing and access | Robert S. Block | 1980-09-30 |
| 4202476 | Web tensioning apparatus for a hostile fluid bath | — | 1980-05-13 |