Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7839550 | Volume holographic filter with broad acceptance angle and narrow spectral bandwidth | Richard I. Billmers, Elizabeth J. Billmers, Mary E. Ludwig | 2010-11-23 |
| 7480048 | Monochromator employing single grating volume holograms and method of use | Richard I. Billmers, Elizabeth J. Billmers, Mary E. Ludwig | 2009-01-20 |