Granted Patent
Utility
US 3,984,846 · App. 05/538,228
Photoreceptor assembly for automatic focusing system
Inventors:
John Gallagher, Kenneth L. Hendrickson, Robert F. Johnston, John A. Thiel
Patented Case
View Patent ↗
Granted: Oct 5, 1976
Filed: Jan 2, 1975
Inventors
John Gallagher
Kenneth L. Hendrickson
Robert F. Johnston
John A. Thiel
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.