Granted Patent
Utility
US 4,676,771 · App. 06/846,072
Arterial blood filter
Inventor:
Arthur W. Henke
Patented Case
View Patent ↗
Granted: Jun 30, 1987
Filed: Mar 31, 1986
Inventor
Arthur W. Henke
Assignee (at issue)
Gelman Sciences
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.