|
US3400407A
|
|
Helmet with retractable visor
|
|
US3187342A
|
|
Chin strap for a helmet
|
|
US3241154A
|
|
Safety helmets
|
|
US3178723A
|
|
Sound attenuating device and supporting means in a helmet
|
|
US3110034A
|
|
Helmet with vent in visor cover
|
|
US3237202A
|
|
Visor detent device
|
|
US3148376A
|
|
Support for head engaging device
|
|
US3127615A
|
|
Removable rigging for helmet
|
|
US3190973A
|
|
Rigid shell helmet and rigging and sound attenuating means therefor
|
|
US3066305A
|
|
Eye shield supporting and detent means for helmet
|
|
US3065747A
|
|
Mask retaining device for a helmet
|
|
US3055013A
|
|
Helmet construction
|
|
US3055012A
|
|
Helmet with hood liner
|
|
US3005203A
|
|
Soft helmet for carrying sound attenuating earmuffs
|
|
US2983923A
|
|
Rigging for protective helmet
|
|
US2926355A
|
|
Headband rigging for safety helmets
|
|
US2871484A
|
|
Close-fitting helmet
|
|
US2812507A
|
|
Electrical connector
|
|
US2860343A
|
|
Headgear with retractable eye shield
|
|
US2936458A
|
|
Eye shield
|
