Granted Patent
Utility
US 4,907,600 · App. 07/222,151
Blood collector cylinder with needle ejector
Inventor:
Treesa A. Spencer
Patented Case
View Patent ↗
Granted: Mar 13, 1990
Filed: Jul 21, 1988
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.