Granted Patent
Utility
US 5,394,464 · App. 08/204,029
Progressive automatic activation and automatic resetting of call coverage
Inventors:
Thomas C. Hanson, Richard P. Moleres
Patented Case
View Patent ↗
Granted: Feb 28, 1995
Filed: Mar 1, 1994
Inventors
Thomas C. Hanson
Richard P. Moleres
Assignee (at issue)
AT&T CORP.
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.