Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5080931 | Doped polymer films for waveguides | Martin J. Goodwin, Robert Baker-Glenn, Jack Brettle, Neil Carr | 1992-01-14 |
| 5045348 | Thin film deposition process | Crofton Brierley | 1991-09-03 |
| 5026619 | Reversible infra-red recording medium | — | 1991-06-25 |
| 4990287 | Optical devices utilizing photochromic compounds | Ian Bennion, Rosemary Cush, Christopher J. Groves-Kirby | 1991-02-05 |
| 4942113 | Contrast enhanced photolithography | — | 1990-07-17 |
| 4927180 | Marking of articles with photochromic compounds | Jack Brettle | 1990-05-22 |
| 4861899 | Photochromic gamma butyrolactones | — | 1989-08-29 |
| 4838634 | Organic optical waveguides and method of fabricating waveguide structures | Ian Bennion, Jack Brettle, Martin J. Goodwin, Robert Glenn | 1989-06-13 |
| 4818096 | Photoreactive lenses with adamantane spiro compounds | Harry G. Heller, Stephen N. Oliver, John Whittall, Jack Brettle, Martin W. Baskerville | 1989-04-04 |
| 4812171 | Irreversible photochromic markings | Jack Brettle | 1989-03-14 |
| 4685783 | Polychromic tetracyclo-spiro-adamatylidene derivatives, and polychromic lens incorporating said compounds | Harold H. Heller, Stephen N. Oliver, John Whittal, William Johncock, Paul J. Darcy | 1987-08-11 |