| PAT. NO. | TITLE | ISSUE DATE |
| 6,750,995 | EHANCE VOLUME PHASE GRATING WITH HIGH DISPERSION, HIGH DIFFRACTION EFFICIENCY AND LOW POLARIZATION SENSITIVITY | June 15, 2004 |
| 7,321,466 | HIGH DISPERSION DIFFRACTION GRATING INCLUDING MULTIPLE HOLOGRAPHIC OPTICAL ELEMENTS | January 22, 2008 |
| 626364 | HIGH DISPERSION DIFFRACTION GRATING INCLUDING MULTIPLE HOLOGRAPHIC OPTICAL ELEMENTS | May 26, 2010 |
| 8,537,466 | HIGH DISPERSION DIFFRACTION GRATING INCLUDING MULTIPLE HOLOGRAPHIC OPTICAL ELEMENTS | September 17, 2013 |
| 8,077,929 | AMBIENT LIGHT REJECTION FILTER | December 13, 2011 |
| 8,786,924 | GRATING FOR TUNING A LIGHT SOURCE | July 22, 2014 |
| 8,922,768 | MULTI-PATH SPECTROMETER | December 30, 2014 |
GRATINGS +1 435.752.4301 SPECTROMETERS +1 919.544.7785 OCT +1 919.544.7785