Granted Patent
Utility
US 4,520,819 · App. 06/485,346
Tourniquet with differential pressure occlusion detector
Inventors:
Michael John Birmingham, Michael R. Manes
Patented Case
View Patent ↗
Granted: Jun 4, 1985
Filed: Apr 15, 1983
Inventors
Michael John Birmingham
Michael R. Manes
Assignee (at issue)
Aspen Laboratories, 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.