Issued Patents All Time
Showing 26–36 of 36 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5550928 | Audience measurement system and method | Ceril T. Shagrin, William L. Thomas, Morris Lee, Bruce E. Bernard, Jia Zhang | 1996-08-27 |
| 5481294 | Audience measurement system utilizing ancillary codes and passive signatures | William L. Thomas | 1996-01-02 |
| 5432864 | Identification card verification system | Simon Lu | 1995-07-11 |
| 5331544 | Market research method and system for collecting retail store and shopper market research data | David A. Kiewit, Jia Zhang | 1994-07-19 |
| 5243423 | Spread spectrum digital data transmission over TV video | Jean P. Dejean, Robert Weissman | 1993-09-07 |
| 5165069 | Method and system for non-invasively identifying the operational status of a VCR | James Joseph Vitt, Allen L. Fulmer | 1992-11-17 |
| 5031228 | Image recognition system and method | — | 1991-07-09 |
| 4858000 | Image recognition audience measurement system and method | — | 1989-08-15 |
| 4697209 | Methods and apparatus for automatically identifying programs viewed or recorded | David A. Kiewit | 1987-09-29 |
| 4677466 | Broadcast program identification method and apparatus | John G. Lert, Jr. | 1987-06-30 |
| 4644509 | Ultrasonic audience measurement system and method | David A. Kiewit | 1987-02-17 |