Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6984058 | Optical filters comprising opacified portion | Geoffrey P. Morris, Richard Fischer, Warren Ketola | 2006-01-10 |
| 6906857 | Optical filters for manipulating spectral power distribution in accelerated weathering devices | Richard Fischer, Warren Ketola, James Riley | 2005-06-14 |
| 6859309 | Optical filters for manipulating spectral power distribution in accelerated weathering devices | Richard Fischer, Warren Ketola, James Riley | 2005-02-22 |