Granted Patent
Utility
US 5,167,510 · App. 07/786,714
Crosspoint switch module and matrix
Inventor:
Cole N. Plummer
Patented Case
View Patent ↗
Granted: Dec 1, 1992
Filed: Nov 1, 1991
Inventor
Cole N. Plummer
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.