Granted Patent
Utility
US 5,864,757 · App. 08/570,912
Methods and apparatus for locking communications devices
Inventor:
John P. Parker
Patented Case
View Patent ↗
Granted: Jan 26, 1999
Filed: Dec 12, 1995
Inventor
John P. Parker
Assignee (at issue)
BellSouth 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.