Granted Patent
Utility
US 4,323,736 · App. 06/176,668
Step-up circuit for driving full-range-element electrostatic loudspeakers
Inventor:
James C. Strickland
Patented Case
View Patent ↗
Granted: Apr 6, 1982
Filed: Aug 11, 1980
Inventor
James C. Strickland
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.