Granted Patent
Utility
US 4,925,464 · App. 07/272,626
Fluid flow switching valve assembly and system
Inventors:
Richard Rabenau, Rowland W. Kanner, Donald W. Hunter
Patented Case
View Patent ↗
Granted: May 15, 1990
Filed: Nov 17, 1988
Inventors
Richard Rabenau
Rowland W. Kanner
Donald W. Hunter
Assignee (at issue)
RYDER INTERNATIONAL CO., LTD.
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.