Granted Patent
Utility
US 4,451,562 · App. 06/371,973
Blood oxygenator
Inventors:
Roger J. Elgas, Timothy M. Gordon
Patented Case
View Patent ↗
Granted: May 29, 1984
Filed: Apr 26, 1982
Inventors
Roger J. Elgas
Timothy M. Gordon
Assignee (at issue)
Cobe 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.