Helmet

The ornamental design for a helmet, as shown and described.

FIG. 1 is a front perspective view of a helmet showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a side elevational view the opposite side is a mirror image thereof;

FIG. 4 is a rear elevational view thereof; and

FIG. 5 is a top plan view thereof.

Patent	Priority	Assignee	Title
D408946,	Aug 02 1996	SEXTANT AVIONIQUE SOCIETE ANONYME	Fighter aircraft helmet
D439021,	Jan 14 1998	MSA Gallet	Protective helmet
D448526,	Jan 18 2000	BRICO S R 1	Helmet
D448890,	Jan 18 2000	BRICO S R L	Helmet
D495838,	Jul 10 2003	Arai Helmet (Europe) B.V.	Helmet
D509928,	Mar 12 2004		Football helmet
D510644,	Sep 05 2003	NP Aerospace Limited	Protective helmet
D512534,	Apr 21 2004	KRANOS IP CORPORATION	Protective helmet
D547007,	Feb 28 2005	Schuberth Werk GmbH	Commando helmet
D567450,	Nov 18 2004	Helmet Integrated Systems Limited	Helmet
D575459,	Sep 28 2006		Helmet
D621551,	May 14 2009	SHOEI CO., LTD.	Helmet
D622005,	May 14 2009	SHOEI CO., LTD.	Helmet
D682479,	Apr 28 2011	MSA Production France	Fireman helmet
D696464,	Aug 22 2012	HJC Corp.	Helmet
D696465,	Aug 22 2012	HJC Corp.	Helmet
D724791,	Mar 15 2013	Bell Sports, Inc.	Protective motorsports mask
D762012,	May 26 2015		Helmet
D834257,	Oct 17 2016		Orthogonal mask

Patent	Priority	Assignee	Title
3858242,
4081865,	Jul 08 1977		Protective helmet and ventilating system therefor
4097929,	May 14 1976	RACAL ACOUSTIC SERVICES LIMITED	Protective visor means for a helmet
4866792,	Jun 09 1987		Shield mounting assembly for a safety helmet

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