Granted Patent
Utility
US 5,337,018 · App. 07/976,074
Electronic sensor for determining alcohol content of fuels
Inventor:
Frederick G. Yamagishi
Patented Case
View Patent ↗
Granted: Aug 9, 1994
Filed: Nov 13, 1992
Inventor
Frederick G. Yamagishi
Assignee (at issue)
Hughes Aircraft 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.