Granted Patent
Utility
US 4,649,938 · App. 06/728,985
Tissue-stimulating electrode having sealed, low-friction extendable/retractable active fixation means
Inventor:
William A. McArthur
Patented Case
View Patent ↗
Granted: Mar 17, 1987
Filed: Apr 29, 1985
Inventor
William A. McArthur
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.