Granted Patent
Utility
US 4,054,953 · App. 05/718,474
Crash helmet
Inventor:
Philippe De Barsy
Patented Case
View Patent ↗
Granted: Oct 25, 1977
Filed: Aug 30, 1976
Inventor
Philippe De Barsy
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.