| 9279084 |
Security device using liquid crystals |
Robert E. Renton, Andrew Neil Cammidge |
2016-03-08 |
| 9234992 |
Optically variable device with diffraction-based micro-optics, method of creating the same, and article employing the same |
Dean Hill, Robert E. Renton, Andrew K. Rowe |
2016-01-12 |
| 9025251 |
Optically variable devices, security device and article employing same, and associated method of creating same |
Robert E. Renton, Donald William Tomkins |
2015-05-05 |
| 8488242 |
Optically variable device with diffraction-based micro-optics, method of creating the same, and article employing the same |
Dean Hill, Robert E. Renton, Andrew K. Rowe |
2013-07-16 |
| 6266187 |
Substrate producing three-dimensional images |
Andrew K. Rowe |
2001-07-24 |
| 6226127 |
Optical images |
Andrew K. Rowe |
2001-05-01 |