Granted Patent
Utility
US 4,456,014 · App. 06/449,540
Flow restrictor
Inventors:
Keith E. Buck, Irving C. Chase, Marius J. Morin
Patented Case
View Patent ↗
Granted: Jun 26, 1984
Filed: Jan 3, 1983
Inventors
Keith E. Buck
Irving C. Chase
Marius J. Morin
Assignee (at issue)
Thoratec Laboratories Corporation
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.