Granted Patent
Utility
US 4,286,120 · App. 06/084,960
Current regulated pulse dialer circuit
Inventor:
John D. Sublette
Patented Case
View Patent ↗
Granted: Aug 25, 1981
Filed: Oct 15, 1979
Inventor
John D. Sublette
Assignee (at issue)
GTE Automatic Electric Labs 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.