Issued Patents 2016
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9330583 | Field retrofit kit for converting a static billboard into a dynamic electronic billboard, and methods of retrofitting and using same | David F. Cox, John Van Doorn, Arne E. Carlson, James Warren Frederick | 2016-05-03 |