Granted Patent
Utility
US 4,493,092 · App. 06/450,615
Interface circuit for digital signal transmission system
Inventor:
Tello D. Adams
Patented Case
View Patent ↗
Granted: Jan 8, 1985
Filed: Dec 17, 1982
Inventor
Tello D. Adams
Assignee (at issue)
GTE Automatic Electric Incorporated
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.