Granted Patent
Utility
US 5,606,434 · App. 08/269,919
Achromatic optical system including diffractive optical element
Inventors:
Michael R. Feldman, Bob Te Kolste, W. Hudson Wlech, Hedong Yang
Patented Case
View Patent ↗
Granted: Feb 25, 1997
Filed: Jun 30, 1994
Inventors
Michael R. Feldman
Bob Te Kolste
W. Hudson Wlech
Hedong Yang
Assignee (at issue)
University of North Carolina
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.