Granted Patent
Utility
US 4,155,336 · App. 05/866,429
Charge forming apparatus with fuel air ratio control
Inventor:
Irving H. Hallberg
Patented Case
View Patent ↗
Granted: May 22, 1979
Filed: Jan 3, 1978
Inventor
Irving H. Hallberg
Assignee (at issue)
BorgWarner 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.