Granted Patent
Utility
US 4,643,176 · App. 06/756,660
Athletic knee protector with bowed leaf spring structure
Inventors:
Bradley R. Mason, Jeffrey T. Mason
Patented Case
View Patent ↗
Granted: Feb 17, 1987
Filed: Jul 19, 1985
Inventors
Bradley R. Mason
Jeffrey T. Mason
Assignee (at issue)
Don Joy, 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.