Granted Patent
Utility
US 4,231,354 · App. 05/924,567
Pulsatile blood pumping apparatus and method
Inventors:
Robert J. Kurtz, Spencer Silverstein
Patented Case
View Patent ↗
Granted: Nov 4, 1980
Filed: Jul 14, 1978
Inventors
Robert J. Kurtz
Spencer Silverstein
Assignee (at issue)
Howmedica Inc.
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.