Granted Patent
Utility
US 6,671,889 · App. 10/435,950
Multi-layer, personnel-protective helmet shell with spray-fabricated inner and outer structural layers
Inventors:
Michael Dennis, Russell A. Monk
Patented Case
View Patent ↗
Granted: Jan 6, 2004
Filed: May 12, 2003
Inventors
Michael Dennis
Russell A. Monk
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.