Issued Patents All Time
Showing 51–63 of 63 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6369947 | Surface pattern | Wayne Robert Tompkin | 2002-04-09 |
| 6365907 | Device for recognizing diffraction optical markings | Wayne Robert Tompkin | 2002-04-02 |
| 6359734 | Surface pattern | Wayne Robert Tompkin | 2002-03-19 |
| 6324004 | Planar patterns with superimposed diffraction gratings | Wayne Robert Tompkin | 2001-11-27 |
| 6226109 | Diffractive security device on compact discs | Wayne Robert Tompkin | 2001-05-01 |
| 6157487 | Optically variable surface pattern | Wayne Robert Tompkin | 2000-12-05 |
| 6060143 | Optical information carrier | Wayne Robert Tompkin | 2000-05-09 |
| 5969863 | Surface pattern including light-diffracting relief structures | Wayne Robert Tompkin | 1999-10-19 |
| 5886798 | Information carriers with diffraction structures | Wayne Robert Tompkin | 1999-03-23 |
| 5882463 | Method of applying a security element to a substrate | Wayne Robert Tompkin | 1999-03-16 |
| 5875170 | Optical data carriers and reading devices therefor | Wayne Robert Tompkin | 1999-02-23 |
| 5760961 | Optical information carrier having diffractive features and diffraction modulation layers | Wayne Robert Tompkin | 1998-06-02 |
| 5754520 | Optical data carriers and reading devices therefor | Wayne Robert Tompkin | 1998-05-19 |