Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7770314 | Outdoor advertising system | — | 2010-08-10 |
| 6829262 | Aging in tunable semiconductor lasers | David Alan Ackerman, Sung-Nee George Chu, John Evan Johnson, Leonard Jan-Peter Ketelsen, Liming Zhang | 2004-12-07 |
| 6690689 | Apparatus and method for compensating for age induced wavelength drift in tunable semiconductor lasers | David Alan Ackerman | 2004-02-10 |