Granted Patent
Utility
US 4,980,097 · App. 07/378,760
Carburetor-air reversion
Inventor:
William H. Edmonston
Patented Case
View Patent ↗
Granted: Dec 25, 1990
Filed: Jul 12, 1989
Inventor
William H. Edmonston
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.