Granted Patent
Utility
US 4,840,542 · App. 07/037,019
Infusion pump with direct pressure sensing
Inventor:
Martyn Stuart Abbott
Patented Case
View Patent ↗
Granted: Jun 20, 1989
Filed: Apr 10, 1987
Inventor
Martyn Stuart Abbott
Assignee (at issue)
Quest Medical, 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.