Granted Patent
Utility
US 5,301,372 · App. 08/018,515
Fastener for releasably fastening face guard to helmet
Inventor:
Hiroshi Matoba
Patented Case
View Patent ↗
Granted: Apr 12, 1994
Filed: Feb 17, 1993
Inventor
Hiroshi Matoba
Assignee (at issue)
Yoshida Kogyo K.K.
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.