Granted Patent
Utility
US 5,083,320 · App. 07/632,900
Protective helmet with self-contained air pump
Inventor:
Peter David Halstead
Patented Case
View Patent ↗
Granted: Jan 28, 1992
Filed: Dec 24, 1990
Inventor
Peter David Halstead
Assignee (at issue)
Athletic Helmet, 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.