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Publication numberUSD398421 S
Publication typeGrant
Application numberUS 29/055,704
Publication dateSep 15, 1998
Filing dateJun 11, 1996
Priority dateDec 12, 1995
Publication number055704, 29055704, US D398421 S, US D398421S, US-S-D398421, USD398421 S, USD398421S
InventorsCarl-Goran Crafoord, Håkan Bergkvist, Kjell Mases, Rutger Belin
Original AssigneeHornell Elektrooptik Ab
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Protective helmet
US D398421 S
Abstract  available in
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  1. The ornamental design for a protective helmet, as shown and described.

FIG. 1 is a rear perspective view of a protective helmet, showing our new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a left side elevational view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US6401244Mar 13, 2001Jun 11, 2002Sellstrom Manufacturing Co.Welding helmet and face plate
US7104264Mar 26, 2004Sep 12, 20063M Innovative Properties CompanyRigid air ducting for respirator hoods and helmets
US8826464Sep 29, 2011Sep 9, 2014Tecmen Electronics Co., Ltd.Filter holding system for welding mask
US8990963Aug 23, 2006Mar 31, 2015Lincoln Global, Inc.User-friendly welding helmet assembly
US20040216736 *Mar 26, 2004Nov 4, 2004Lee Peter DRigid air ducting for respirator hoods and helmets
USD732746Jun 5, 2013Jun 23, 2015Tecmen Electronics Co., Ltd.Welding helmet
USD734557 *Dec 14, 2013Jul 14, 2015Frank StankusWelding helmet with adjustable fan
USD734558Dec 16, 2013Jul 14, 2015Tecmen Electronics Co., Ltd.Welding helmet
U.S. ClassificationD29/110