Issued Patents All Time
Showing 26–50 of 52 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5574963 | Audience measurement during a mute mode | Thomas Langer | 1996-11-12 |
| 5515270 | Technique for correlating purchasing behavior of a consumer to advertisements | — | 1996-05-07 |
| 5457807 | Technique for surveying a radio or a television audience | — | 1995-10-10 |
| 5401946 | Technique for correlating purchasing behavior of a consumer to advertisements | — | 1995-03-28 |
| 5234345 | Survey technique for readership of publications | — | 1993-08-10 |
| 5019679 | Flat switch insertable into a magazine and usable as part of a survey technique for readership of publications | — | 1991-05-28 |
| 4992867 | Technique for monitoring magazine readers while permitting a greater choice for the reader of possible reading positions | — | 1991-02-12 |
| 4939326 | Flat switch insertable into a magazine and usable as part of a survey technique for readership of publications | — | 1990-07-03 |
| 4866880 | Plant watering device | — | 1989-09-19 |
| 4837851 | Monitoring technique for determining what location within a predetermined area is being viewed by a person | — | 1989-06-06 |
| 4781596 | Survey technique for readership of publications | — | 1988-11-01 |
| 4726771 | Flat switch insertable into a magazine and usable as part of a survey technique for readership of publications | — | 1988-02-23 |
| 4718106 | Survey of radio audience | — | 1988-01-05 |
| 4695879 | Television viewer meter | — | 1987-09-22 |
| 4670738 | Computer input technique | — | 1987-06-02 |
| 4661847 | Technique for monitoring magazine readers | — | 1987-04-28 |
| 4659197 | Eyeglass-frame-mounted eye-movement-monitoring apparatus | — | 1987-04-21 |
| 4659314 | Survey technique for readership of publications | — | 1987-04-21 |
| 4649434 | Eyeglass-frame mountable view monitoring device | — | 1987-03-10 |
| 4647964 | Technique for testing television commercials | — | 1987-03-03 |
| 4635110 | Portable video and audio equipment holder for use in an automobile | — | 1987-01-06 |
| 4623230 | Media survey apparatus and method using thermal imagery | — | 1986-11-18 |
| 4582403 | Head movement correction technique for eye-movement monitoring system | — | 1986-04-15 |
| 4574314 | Camera autofocus technique | — | 1986-03-04 |
| 4528989 | Screening method for monitoring physiological variables | — | 1985-07-16 |