Granted Patent
Utility
US 5,044,016 · App. 07/137,378
Protective helmet assembly including releasable head retaining assembly
Inventor:
Christopher E. Coombs
Patented Case
View Patent ↗
Granted: Sep 3, 1991
Filed: Dec 23, 1987
Inventor
Christopher E. Coombs
Assignee (at issue)
Cairns & Brother 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.