| PAT. NO. | TITLE | ISSUE DATE |
| US6750995B2 | Enhanced volume phase grating with high dispersion, high diffraction efficiency and low polarization sensitivity | June 15, 2004 |
| US7321466B2 | High dispersion diffraction grating including multiple holographic optical elements | January 22, 2008 |
| US8537466B2 | High dispersion diffraction grating including multiple holographic optical elements | September 17, 2013 |
| US8077929B2 | Ambient light rejection filter | December 13, 2011 |
| US8786924B1 | Grating for tuning a light source | July 22, 2014 |
| US8922768B2 | Multi-path spectrometer | December 30, 2014 |
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