| 10948745 |
Vision-protecting filter lens having organic polymer multilayer and neutral-density optical filter |
Michael E. Hallock, Britton G. Billingsley |
2021-03-16 |
| 10114242 |
Curved automatic-darkening filter |
Kristina M. Magnusson, Britton G. Billingsley, Kenneth Jarefors, Larissa Zuravskaja |
2018-10-30 |
| 9744329 |
Air filtration device having subsections lacking fluid communication |
Britton G. Billingsley, David M. Blomberg |
2017-08-29 |
| 9744328 |
Air filtration device having tuned air distribution system |
Britton G. Billingsley, David M. Blomberg |
2017-08-29 |
| 8899227 |
Air filtration device having subsections lacking fluid communication |
Britton G. Billingsley, David M. Blomberg |
2014-12-02 |
| 8887719 |
Air filtration device having tuned air distribution system |
Britton G. Billingsley, David M. Blomberg |
2014-11-18 |
| 7547105 |
Prismatic retroreflective article with cross-linked image layer and method of making same |
Chester A. Bacon, Jr., Bradley R. Ray, Rodney A. Ough |
2009-06-16 |