Granted Patent
Utility
US 4,819,607 · App. 07/106,207
Vapor vent valve apparatus
Inventor:
John A. Aubel
Patented Case
View Patent ↗
Granted: Apr 11, 1989
Filed: Oct 9, 1987
Inventor
John A. Aubel
Assignee (at issue)
Borg-Warner Automotive, 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.