Patents per Year
Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date | Approx Value ⓘ |
|---|---|---|---|---|
| 4541716 | Detection of defects in a circular or spiral diffraction grating | Martin Jonathan Kelly | 1985-09-17 | $3,935,000 |
| 4352175 | Video disc player having record side identifying apparatus | — | 1982-09-28 | $1,334,000 |
| 4282511 | Apparatus for discerning the noticeable presence of spatial fluctuations of intensity within a two-dimensional visual field | Peter D. Southgate | 1981-08-04 | $515,000 |