Granted Patent
Utility
US 4,274,046 · App. 05/916,781
AC Resonance transformer
Inventor:
John L. Harrison
Patented Case
View Patent ↗
Granted: Jun 16, 1981
Filed: Jun 19, 1978
Inventor
John L. Harrison
Assignee (at issue)
Maxwell Laboratories, 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.