Granted Patent
Utility
US 4,801,295 · App. 07/112,538
Disposable hypodermic syringe and needle combination having retractable, accident preventing sheath
Inventor:
Treesa A. Spencer
Patented Case
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Granted: Jan 31, 1989
Filed: Oct 22, 1987
Inventor
Treesa A. Spencer
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.