Granted Patent
Utility
US 4,619,003 · App. 06/801,329
Insulated helmet
Inventor:
Robert L. Asbury
Patented Case
View Patent ↗
Granted: Oct 28, 1986
Filed: Nov 25, 1985
Inventor
Robert L. Asbury
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.