Granted Patent
Utility
US 4,248,828 · App. 05/780,077
Oxygenator
Inventors:
Donald J. Bentley, Donald A. Raible
Patented Case
View Patent ↗
Granted: Feb 3, 1981
Filed: Mar 22, 1977
Inventors
Donald J. Bentley
Donald A. Raible
Assignee (at issue)
Bentley 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.