Granted Patent
Utility
US 5,603,613 · App. 08/304,734
Fluid delivery system having an air bubble ejector
Inventors:
Robert D. Butterfield, Gus G. Tseo
Patented Case
View Patent ↗
Granted: Feb 18, 1997
Filed: Sep 12, 1994
Inventors
Robert D. Butterfield
Gus G. Tseo
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.