Granted Patent
Utility
US 4,683,374 · App. 06/763,156
Method and means for multiplexing optical sensors
Inventor:
Edward L. Weiss
Patented Case
View Patent ↗
Granted: Jul 28, 1987
Filed: Aug 7, 1985
Inventor
Edward L. Weiss
Assignee (at issue)
Federal Signal Corporation
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.