Granted Patent
Utility
US 4,991,743 · App. 07/432,364
Controlled flow accumulator
Inventor:
John C. Walker
Patented Case
View Patent ↗
Granted: Feb 12, 1991
Filed: Nov 6, 1989
Inventor
John C. Walker
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.