Granted Patent
Utility
US 4,582,391 · App. 06/480,125
Optical switch, and a matrix of such switches
Inventor:
Jacques Legrand
Patented Case
View Patent ↗
Granted: Apr 15, 1986
Filed: Mar 29, 1983
Inventor
Jacques Legrand
Assignee (at issue)
Socapex
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.