Granted Patent
Utility
US 4,565,629 · App. 06/672,931
Filter assembly
Inventors:
Michael E. Wilson, Jr., David R. Olson, Walter H. Stone, Robin B. MacDonald
Patented Case
View Patent ↗
Granted: Jan 21, 1986
Filed: Nov 19, 1984
Inventors
Michael E. Wilson, Jr.
David R. Olson
Walter H. Stone
Robin B. MacDonald
Assignee (at issue)
Parker-Hannifin Corporation
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.