Granted Patent
Utility
US 5,884,894 · App. 08/700,194
Inner-loop valve spool positioning control apparatus
Inventor:
Brian Smith
Patented Case
View Patent ↗
Granted: Mar 23, 1999
Filed: Aug 20, 1996
Inventor
Brian Smith
Assignee (at issue)
Valtek, Inc.
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.