Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4816904 | Television and market research data collection system and method | William J. McKenna, Kenneth W. Silvers, Rand B. Nickerson, Russell J. Welsh, Harold R. Walker +1 more | 1989-03-28 |
| 4658290 | Television and market research data collection system and method | William J. McKenna, Kenneth W. Silvers, Rand B. Nickerson, Russell J. Welsh, Harold R. Walker +1 more | 1987-04-14 |
| 4546382 | Television and market research data collection system and method | William J. McKenna, Kenneth W. Silvers, Rand B. Nickerson, Russell J. Welsh, Harold R. Walker +1 more | 1985-10-08 |