Granted Patent
Utility
US 4,772,107 · App. 06/927,215
Wide angle lens with improved flat field characteristics
Inventor:
Irwin Friedman
Patented Case
View Patent ↗
Granted: Sep 20, 1988
Filed: Nov 5, 1986
Inventor
Irwin Friedman
Assignee (at issue)
PerkinElmer, Inc.
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.