Issued Patents All Time
Showing 26–30 of 30 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8854730 | Negatively birefringent polyesters and optical films | Lei Wang, George W. Griesgraber, Stephen A. Johnson, David S. Hays | 2014-10-07 |
| 8792165 | Internally patterned multilayer optical films with multiple birefringent layers | William W. Merrill, Douglas S. Dunn, Stephen A. Johnson | 2014-07-29 |
| 8263731 | Optical film comprising birefringent naphthalate copolyester having branched or cyclic C4-C10 alkyl units | Yufeng Liu, Stephen A. Johnson, Kristopher J. Derks | 2012-09-11 |
| 8220932 | Dry erasable projection article and system | Yufeng Liu, Encai Hao, Lan H. Liu, Frederick J. Gustafson, Willem V. Bastiaens +1 more | 2012-07-17 |
| 8012571 | Optical film comprising birefringent naphthalate copolyester having branched or cyclic C4-C10 alkyl units | Yufeng Liu, Stephen A. Johnson, Kristopher J. Derks | 2011-09-06 |