Granted Patent
Utility
US 5,251,482 · App. 07/552,642
Low frequency acoustic fuel sensor
Inventors:
Kenn S. Bates, David B. Chang
Patented Case
View Patent ↗
Granted: Oct 12, 1993
Filed: Jul 16, 1990
Inventors
Kenn S. Bates
David B. Chang
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.