Granted Patent
Utility
US 3,994,294 · App. 05/554,091
Syringe pump valving and motor direction control system
Inventor:
Wallace L. Knute
Patented Case
View Patent ↗
Granted: Nov 30, 1976
Filed: Feb 28, 1975
Inventor
Wallace L. Knute
Assignee (at issue)
IVAC 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.