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Deformable safety helmet

A - Human Necessities – 42 – B
Patent

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Detachable bicycle helmer visor

A - Human Necessities – 42 – B
Patent

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

A - Human Necessities – 42 – C
Patent

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Device for adjusting head band for protective helmet

A - Human Necessities – 42 – B
Patent

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Device for attaching a pair of spectacles to head gear

A - Human Necessities – 42 – B
Patent

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Device for mounting an ear muff on a helmet

A - Human Necessities – 42 – B
Patent

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Device for mounting the visor onto the cap of a helmet

A - Human Necessities – 42 – B
Patent

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

A - Human Necessities – 42 – B
Patent

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Disposable head covering garment

A - Human Necessities – 42 – B
Patent

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Disposable liner for hard hats

A - Human Necessities – 42 – B
Patent

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

A - Human Necessities – 42 – B
Patent

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Double lens electric shield

A - Human Necessities – 42 – B
Patent

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Double lens helmet face shield with electric heating field

A - Human Necessities – 42 – B
Patent

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Double walled crash helmet with sealed breakthroughs and...

A - Human Necessities – 42 – B
Patent

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Dual-structure helmet and method of manufacturing the same

A - Human Necessities – 42 – B
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