Issued Patents All Time
Showing 1–25 of 58 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12275260 | Security device formed by printing with special effect inks | Vladimir P. Raksha, Paul G. Coombs | 2025-04-15 |
| 11504990 | Security device formed by printing with special effect inks | Vladimir P. Raksha, Paul G. Coombs | 2022-11-22 |
| 11230127 | Method and apparatus for orienting magnetic flakes | Vladimir P. Raksha, Paul G. Coombs | 2022-01-25 |
| 11079525 | Matched interference pigments or foils having viewing angle dependent mismatch | Cornelis Jan Delst, Matthew R. Witzman, Paul T. Kohlmann | 2021-08-03 |
| 10343436 | Security device formed by printing with special effect inks | Vladimir P. Raksha, Paul G. Coombs | 2019-07-09 |
| 10242788 | Anisotropic magnetic flakes | Vladimir P. Raksha, Paul G. Coombs, Roger W. Phillips, Paul T. Kohlmann, Alberto Argoitia +1 more | 2019-03-26 |
| 10173455 | Dynamic appearance-changing optical devices (DACOD) printed in a shaped magnetic field including printable fresnel structures | Vladimir P. Raksha, Paul G. Coombs, Alberto Argoitia, Roger W. Phillips | 2019-01-08 |
| 10059137 | Apparatus for orienting magnetic flakes | Vladimir P. Raksha, Paul G. Coombs | 2018-08-28 |
| 10061065 | Interference pigments or foils as separate structures having color match or mismatch depending on viewing angle | Cornelis Jan Delst, Matthew R. Witzman, Paul T. Kohlmann | 2018-08-28 |
| 10031269 | Durable optical interference pigment with a bimetal core | Cornelis Jan Delst, Vladimir P. Raksha, David de la Fuente, Paul G. Coombs | 2018-07-24 |
| 9662925 | Anisotropic magnetic flakes | Vladimir P. Raksha, Paul G. Coombs, Roger W. Phillips, Paul T. Kohlmann, Alberto Argoitia +1 more | 2017-05-30 |
| 9522402 | Method and apparatus for orienting magnetic flakes | Vladimir P. Raksha, Paul G. Coombs | 2016-12-20 |
| 9482800 | Durable optical interference pigment with a bimetal core | Cornelis Jan Delst, Vladimir P. Raksha, David de la Fuente, Paul G. Coombs | 2016-11-01 |
| 9257059 | Dynamic appearance-changing optical devices (DACOD) printed in a shaped magnetic field including printable fresnel structures | Vladimir P. Raksha, Paul G. Coombs, Alberto Argoitia, Roger W. Phillips | 2016-02-09 |
| RE45762 | Printed magnetic ink overt security image | Vladimir P. Raksha, Cornelis Jan Delst, Paul G. Coombs, Alberto Argoitia | 2015-10-20 |
| 9027479 | Method and apparatus for orienting magnetic flakes | Vladimir P. Raksha, Paul G. Coombs | 2015-05-12 |
| 8726806 | Apparatus for orienting magnetic flakes | Vladimir P. Raksha, Jay M. Holman, Paul G. Coombs, Roger W. Phillips | 2014-05-20 |
| 8511712 | Mixture of magnetically orientable color shifting flakes and non-magnetically orientable color shifting flakes exhibiting a common color | Vladimir P. Raksha, Michael Ray Nofi, Paul G. Coombs | 2013-08-20 |
| 8343615 | Dynamic appearance-changing optical devices (DACOD) printed in a shaped magnetic field including printable fresnel structures | Vladimir P. Raksha, Paul G. Coombs, Alberto Argoitia, Roger W. Phillips | 2013-01-01 |
| 8287989 | Security image coated with a single coating having visually distinct regions | Vladimir P. Raksha, Roger W. Phillips, Paul G. Coombs | 2012-10-16 |
| 8276511 | Apparatus for orienting magnetic flakes | Vladimir P. Raksha, Jay M. Holman, Paul G. Coombs, Roger W. Phillips | 2012-10-02 |
| 8211509 | Alignment of paste-like ink having magnetic particles therein, and the printing of optical effects | Vladimir P. Raksha, Dishuan Chu, Thomas Mayer, Paul G. Coombs | 2012-07-03 |
| 8137762 | Two-axial alignment of magnetic platelets | Vladimir P. Raksha, Paul G. Coombs, Wilfred C. Kittler, Jr., Dave Williams, John D. Sonderman +1 more | 2012-03-20 |
| 8025952 | Printed magnetic ink overt security image | Vladimir P. Raksha, Cornelis Jan Delst, Paul G. Coombs, Alberto Argoitia | 2011-09-27 |
| 7934451 | Apparatus for orienting magnetic flakes | Vladimir P. Raksha, Jay M. Holman, Paul G. Coombs, Roger W. Phillips | 2011-05-03 |