Granted Patent
Utility
US 4,374,303 · App. 06/248,128
Power supply control circuit for subscriber carrier telephone system
Inventor:
James A. Stewart
Patented Case
View Patent ↗
Granted: Feb 15, 1983
Filed: Mar 27, 1981
Inventor
James A. Stewart
Assignee (at issue)
GTE Automatic Electric Laboratories, 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.