Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5061659 | Contrast enhancement filter glass useful for color CRT displays | David G. Krashkevich | 1991-10-29 |
| 5059561 | UV attenuated colored glasses | David G. Krashkevich | 1991-10-22 |