Granted Patent
Utility
US 4,292,480 · App. 06/122,891
Method and apparatus for locating telephones
Inventor:
Robert L. Sweatt
Patented Case
View Patent ↗
Granted: Sep 29, 1981
Filed: Feb 19, 1980
Inventor
Robert L. Sweatt
Assignee (at issue)
Western Electric Company, Inc.
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.