Granted Patent
Utility
US 4,424,720 · App. 06/216,768
Mechanism for screw drive and syringe plunger engagement/disengagement
Inventor:
Richard Bucchianeri
Patented Case
View Patent ↗
Granted: Jan 10, 1984
Filed: Dec 15, 1980
Inventor
Richard Bucchianeri
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.