Granted Patent
Utility
US 4,748,664 · App. 06/930,391
Telephone power supply
Inventor:
Peter F. Blomley
Patented Case
View Patent ↗
Granted: May 31, 1988
Filed: Nov 14, 1986
Inventor
Peter F. Blomley
Assignee (at issue)
STC PLC
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.