Granted Patent
Utility
US 4,479,111 · App. 06/347,244
Photo-optical switch apparatus
Inventors:
Craig C. Madsen, Daniel B. Stewart, James Andree
Patented Case
View Patent ↗
Granted: Oct 23, 1984
Filed: Feb 9, 1982
Inventors
Craig C. Madsen
Daniel B. Stewart
James Andree
Assignee (at issue)
Burroughs, 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.