Granted Patent
Utility
US 5,774,239 · App. 08/771,710
Achromatic optical system including diffractive optical element, and method of forming same
Inventors:
Michael R. Feldman, Bob Te Kolste, W. Hudson Wlech, Hedong Yang
Patented Case
View Patent ↗
Granted: Jun 30, 1998
Filed: Dec 20, 1996
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.