Granted Patent
Utility
US 4,334,222 · App. 06/130,310
Optical selector switch and display apparatus
Inventors:
Michael Kelley, Jack E. Emfinger, Michael A. Dassele
Patented Case
View Patent ↗
Granted: Jun 8, 1982
Filed: Mar 14, 1980
Inventors
Michael Kelley
Jack E. Emfinger
Michael A. Dassele
Assignee (at issue)
Sperry Corp.
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.