Granted Patent
Utility
US 4,272,152 · App. 06/084,745
Unit magnification relay systems
Inventor:
David Shafer
Patented Case
View Patent ↗
Granted: Jun 9, 1981
Filed: Oct 15, 1979
Inventor
David Shafer
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.