Granted Patent
Utility
US 4,240,422 · App. 05/953,604
Syringe with needle and method of attaching same
Inventor:
Thomas A. Hazen
Patented Case
View Patent ↗
Granted: Dec 23, 1980
Filed: Oct 23, 1978
Inventor
Thomas A. Hazen
Assignee (at issue)
American Hospital Supply Corp.
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.