Granted Patent
Utility
US 4,740,168 · App. 07/056,236
Locking device for telephone subscriber plugs
Inventors:
William V. Carney, Robert Leary, Paul V. DeLuca
Patented Case
View Patent ↗
Granted: Apr 26, 1988
Filed: Jun 1, 1987
Inventors
William V. Carney
Robert Leary
Paul V. DeLuca
Assignee (at issue)
Porta Systems 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.