Granted Patent
Utility
US 4,663,765 · App. 06/697,146
Data muting method and apparatus for audo-digital communications systems
Inventors:
Melvin W. Sutphin, Theodore E. Taylor
Patented Case
View Patent ↗
Granted: May 5, 1987
Filed: Feb 1, 1985
Inventors
Melvin W. Sutphin
Theodore E. Taylor
Assignee (at issue)
General Electric Company
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.