Deformable safety helmet

Detachable bicycle helmer visor

Device and method of allowing air to circulate into and out...

Device for adjusting head band for protective helmet

Device for attaching a pair of spectacles to head gear

Device for mounting an ear muff on a helmet

Device for mounting the visor onto the cap of a helmet

Device for unlocking the rotation of a crash-helmet chin guard

Disposable head covering garment

Disposable liner for hard hats

Diver's helmet assembly having a removable valve to fit a...

Double lens electric shield

Double lens helmet face shield with electric heating field

Double walled crash helmet with sealed breakthroughs and...

Dual-structure helmet and method of manufacturing the same