Granted Patent
Utility
US 4,186,732 · App. 05/857,312
Method and apparatus for pulsing a blood flow stimulator
Inventor:
William D. Christoffel
Patented Case
View Patent ↗
Granted: Feb 5, 1980
Filed: Dec 5, 1977
Inventor
William D. Christoffel
Assignee (at issue)
American Hospital Supply Corp.
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.