Granted Patent
Utility
US 4,780,418 · App. 06/932,422
Method and apparatus for measuring the aggregation of blood platelets or the coagulation of blood
Inventor:
Michael Kratzer
Patented Case
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Granted: Oct 25, 1988
Filed: Nov 19, 1986
Inventor
Michael Kratzer
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.