Granted Patent
Utility
US 4,469,414 · App. 06/383,683
Restrictive off-axis field optical system
Inventor:
David Shafer
Patented Case
View Patent ↗
Granted: Sep 4, 1984
Filed: Jun 1, 1982
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.