Granted Patent
Utility
US 4,635,928 · App. 06/723,140
Adjustable speed control arrangement for motorized exercise treadmills
Inventors:
Ralph Ogden, Carl J. Johnson
Patented Case
View Patent ↗
Granted: Jan 13, 1987
Filed: Apr 15, 1985
Inventors
Ralph Ogden
Carl J. Johnson
Assignee (at issue)
Ajax Enterprises Corporation
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.