Granted Patent
Utility
US 5,145,476 · App. 07/806,644
Folding stepper
Inventor:
Matt Chiarello
Patented Case
View Patent ↗
Granted: Sep 8, 1992
Filed: Dec 13, 1991
Inventor
Matt Chiarello
Assignee (at issue)
Roadmaster, Inc.
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.