Granted Patent
Utility
US 6,529,336 · App. 09/831,597
Color corrected projection lenses employing diffractive optical surfaces
Inventor:
Melvyn H. Kreitzer
Patented Case
View Patent ↗
Granted: Mar 4, 2003
Filed: May 11, 2001
Inventor
Melvyn H. Kreitzer
Assignee (at issue)
U.S. Precision Lens Incorporated
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.