Kiewit; David A.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Kiewit; David A..The latest application filed is for "co-channel transmission of program signals and ancillary signals".
- Kiewit; David A. - Palm Harbor FL
- Kiewit; David A. - Arlington Heights IL
| Patent | Date |
|---|---|
| Co-channel transmission of program signals and ancillary signals Grant 5,737,025 - Dougherty , et al. April 7, 1 | 1998-04-07 |
| Market research method and system for collecting retail store and shopper market research data Grant 5,331,544 - Lu , et al. July 19, 1 | 1994-07-19 |
| Sprinkler alarm Grant 5,040,409 - Kiewit August 20, 1 | 1991-08-20 |
| Method and apparatus for identifying individual members of a marketing and viewing audience Grant 4,930,011 - Kiewit May 29, 1 | 1990-05-29 |
| Method and apparatus for determining channel reception of a receiver Grant 4,876,736 - Kiewit October 24, 1 | 1989-10-24 |
| Methods and apparatus for automatically identifying programs viewed or recorded Grant 4,697,209 - Kiewit , et al. September 29, 1 | 1987-09-29 |
| Ultrasonic audience measurement system and method Grant 4,644,509 - Kiewit , et al. February 17, 1 | 1987-02-17 |
| Digital output force sensor using surface acoustic waves Grant 4,107,626 - Kiewit August 15, 1 | 1978-08-15 |
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