Granted Patent
Utility
US 4,288,966 · App. 06/054,509
Method of vacuum timing control
Inventor:
Dwight W. Aten
Patented Case
View Patent ↗
Granted: Sep 15, 1981
Filed: Jul 3, 1979
Inventor
Dwight W. Aten
Assignee (at issue)
Bell and Howell, LLC
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.