Granted Patent
Utility
US 4,352,055 · App. 06/200,433
AC Variable voltage source utilizing pulse width modulation
Inventor:
Thomas McCartney
Patented Case
View Patent ↗
Granted: Sep 28, 1982
Filed: Oct 24, 1980
Inventor
Thomas McCartney
Assignee (at issue)
Oneac Corporation
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.