Granted Patent
Utility
US 6,485,472 · App. 09/621,181
Spikeless connection and drip chamber with valve
Inventor:
Frank M. Richmond
Patented Case
View Patent ↗
Granted: Nov 26, 2002
Filed: Jul 21, 2000
Inventor
Frank M. Richmond
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.