Granted Patent
Utility
US 4,752,232 · App. 07/022,985
Locking device for telephone subscriber plugs
Inventor:
Paul V. De Luca
Patented Case
View Patent ↗
Granted: Jun 21, 1988
Filed: Mar 6, 1986
Inventor
Paul V. De Luca
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.