Granted Patent
Utility
US 5,988,232 · App. 09/134,020
Vapor recovery system employing oxygen detection
Inventors:
Wolfgang Koch, Arthur R. Brown
Patented Case
View Patent ↗
Granted: Nov 23, 1999
Filed: Aug 14, 1998
Inventors
Wolfgang Koch
Arthur R. Brown
Assignee (at issue)
TOKHEIM HOLDING B.V.
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.