Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5774239 | Achromatic optical system including diffractive optical element, and method of forming same | Michael R. Feldman, W. Hudson Wlech, Hedong Yang | 1998-06-30 |
| 5606434 | Achromatic optical system including diffractive optical element | Michael R. Feldman, W. Hudson Wlech, Hedong Yang | 1997-02-25 |