Granted Patent
Utility
US 4,667,348 · App. 06/846,202
Cyclist's helmet and face mask
Inventor:
James G. Sundahl
Patented Case
View Patent ↗
Granted: May 26, 1987
Filed: Mar 31, 1986
Inventor
James G. Sundahl
Assignee (at issue)
Bell Helmets 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.