Granted Patent
Utility
US 4,749,258 · App. 06/795,148
Liquid crystal optical cross point switching device
Inventor:
Anthony P. Baker
Patented Case
View Patent ↗
Granted: Jun 7, 1988
Filed: Nov 5, 1985
Inventor
Anthony P. Baker
Assignee (at issue)
Alcatel USA
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.