Granted Patent
Utility
US 5,489,931 · App. 08/249,500
Fluid delivery system including coiled concentric tubes
Inventors:
Alan Shibata, Eric L. Ahlvin
Patented Case
View Patent ↗
Granted: Feb 6, 1996
Filed: May 26, 1994
Inventors
Alan Shibata
Eric L. Ahlvin
Assignee (at issue)
Hewlett-Packard Company, L.P.
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.