Protective helmet

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Description

FIG. 1 is a front 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.

Claims

We claim the ornamental design for a protective helmet, as shown and described.

Referenced Cited
U.S. Patent Documents
D310276 August 28, 1990 Fuerthbauer et al.
D310432 September 4, 1990 Boochard
D365666 December 26, 1995 Gumpp
D393933 April 28, 1998 Huh
D394732 May 26, 1998 Huh
D398421 September 15, 1998 Crafoord et al.
D419727 January 25, 2000 Verkic et al.
6185739 February 13, 2001 Verkic et al.
D443394 June 5, 2001 Martin et al.
D481832 November 4, 2003 Huh
D482502 November 18, 2003 Huh
D482503 November 18, 2003 Huh
Patent History
Patent number: D520684
Type: Grant
Filed: Sep 3, 2004
Date of Patent: May 9, 2006
Assignee: Optical Engineering Company, LLC (Taunton, MA)
Inventors: Edward L. Martin (Sharon, MA), James Watkins (Taunton, MA)
Primary Examiner: Ruth McInroy
Attorney: Pearson & Pearson, LLP
Application Number: 29/212,629