Granted Patent
Utility
US 4,886,019 · App. 07/270,169
Engine breather assembly with oil drain back
Inventors:
Thomas L. Davis, Roy A. Harper, Jr.
Patented Case
View Patent ↗
Granted: Dec 12, 1989
Filed: Nov 14, 1988
Inventors
Thomas L. Davis
Roy A. Harper, Jr.
Assignee (at issue)
Arrow Specialty Company
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.