Granted Patent
Utility
US 4,627,115 · App. 06/769,386
Ventilated helmet
Inventor:
Lester Broersma
Patented Case
View Patent ↗
Granted: Dec 9, 1986
Filed: Aug 26, 1985
Inventor
Lester Broersma
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.