Issued Patents All Time
Showing 1–18 of 18 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6770225 | Textured retroreflective prism structures and molds for forming same | Robert B. Nilsen, Christopher Alan Barnett | 2004-08-03 |
| 6674875 | Anti-counterfeiting and diffusive screens | Jonathan Michael Blackledge, William Nevil Heaton Johnson | 2004-01-06 |
| 6525877 | Projection screens and the like | Robin J. T. Clabburn, Terence Yeo, Lee Batchelder | 2003-02-25 |
| 6258443 | Textured retroreflective prism structures and molds for forming same | Robert B. Nilsen, Christopher Alan Barnett | 2001-07-10 |
| 6151142 | Grazing incidence holograms and system and method for producing the same | Zane Coleman, Michael Metz | 2000-11-21 |
| 6061463 | Holographic fingerprint device | Michael Metz, Zane Coleman, Carl Flatow | 2000-05-09 |
| 5986746 | Topographical object detection system | Michael Metz, Zane Coleman, Carl Flatow | 1999-11-16 |
| 5974162 | Device for forming and detecting fingerprint images with valley and ridge structure | Michael Metz, Carl Flatow, Zane Coleman | 1999-10-26 |
| 5926319 | Screens having graded refractive index lenses | William Nevil Heaton Johnson | 1999-07-20 |
| 5897980 | Method of imparting contrast enhancement properties to diffusing, depixelating or projection screens | Christopher Alan Barnett, Robin J. T. Clabburn | 1999-04-27 |
| 5822479 | Writing diffraction gratings with interference fringe patterns | Bruce R Napier | 1998-10-13 |
| 5822089 | Grazing incidence holograms and system and method for producing the same | Zane Coleman | 1998-10-13 |
| 5710645 | Grazing incidence holograms and system and method for producing the same | Zane Coleman | 1998-01-20 |
| 5695895 | Randomised mask for a diffusing screen | William Nevil Heaton Johnson | 1997-12-09 |
| 5642449 | Fibre optic plate display | — | 1997-06-24 |
| 5442482 | Microlens screens, photopolymerisable materials and artifacts utilising the same | William Nevil Heaton Johnson | 1995-08-15 |
| 4966428 | Manufacture of integrated circuits using holographic techniques | — | 1990-10-30 |
| 4857425 | Manufacture of integrated circuits using holographic techniques | — | 1989-08-15 |