Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| RE40271 | Echelle grating dense wavelength division multiplexer/demultiplexer | Andrew D. Sappey | 2008-04-29 |
| 6647182 | Echelle grating dense wavelength division multiplexer/demultiplexer | Andrew D. Sappey, Pei Huang, Robert Harr | 2003-11-11 |
| 6415080 | Echelle grating dense wavelength division multiplexer/demultiplexer | Andrew D. Sappey | 2002-07-02 |
| 6304692 | Echelle grating dense wavelength division multiplexer/demultiplexer with two dimensional single channel array | Andrew D. Sappey | 2001-10-16 |