Granted Patent
Utility
US 4,243,930 · App. 06/041,865
Method and means for transmitting low speed signals over a PCM framing code
Inventor:
Calvin DeCoursey
Patented Case
View Patent ↗
Granted: Jan 6, 1981
Filed: May 23, 1979
Inventor
Calvin DeCoursey
Assignee (at issue)
Lynch Communications Systems, 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.