Granted Patent
Utility
US 4,743,371 · App. 06/837,334
Blood filter
Inventors:
Frank M. Servas, Robert F. Gremel, Timothy Ryan
Patented Case
View Patent ↗
Granted: May 10, 1988
Filed: Feb 28, 1986
Inventors
Frank M. Servas
Robert F. Gremel
Timothy Ryan
Assignee (at issue)
Shiley Incorporated
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.