Granted Patent
Utility
US 4,424,709 · App. 06/409,371
Frequency domain engine defect signal analysis
Inventors:
Raymond C. Meier, Jr., Stewart V. Gable
Patented Case
View Patent ↗
Granted: Jan 10, 1984
Filed: Jul 6, 1982
Inventors
Raymond C. Meier, Jr.
Stewart V. Gable
Assignee (at issue)
Ford Motor 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.