Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5677920 | Upconversion fiber laser | Robert G. Waarts, David F. Welch, Donald R. Scifres | 1997-10-14 |
| 5657153 | Optical amplifier with complementary modulation signal inputs | John G. Endriz, David F. Welch, Robert G. Waarts, Donald R. Scifres | 1997-08-12 |