Granted Patent
Utility
US 5,150,709 · App. 07/654,268
Spiral electrode with contact retainer
Inventor:
Theodore C. Neward
Patented Case
View Patent ↗
Granted: Sep 29, 1992
Filed: Feb 11, 1991
Inventor
Theodore C. Neward
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.