Granted Patent
Utility
US 4,550,973 · App. 06/475,285
Achromatic holographic optical system
Inventor:
Robert E. Hufnagel
Patented Case
View Patent ↗
Granted: Nov 5, 1985
Filed: Mar 14, 1983
Inventor
Robert E. Hufnagel
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.