Granted Patent
Utility
US 5,111,319 · App. 07/653,759
Drive circuit for providing at least one of the output waveforms having at least four different voltage levels
Inventor:
Christopher J. Morris
Patented Case
View Patent ↗
Granted: May 5, 1992
Filed: Feb 11, 1991
Inventor
Christopher J. Morris
Assignee (at issue)
Thorn EMI 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.