Protective helmet

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Description

FIG. 1 is a side 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
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Patent History
Patent number: D586051
Type: Grant
Filed: May 15, 2008
Date of Patent: Feb 3, 2009
Assignee: Optical Engineering Company, Inc. (Taunton, MA)
Inventors: Edward L. Martin (Sharon, MA), James Watkins (Taunton, MA)
Primary Examiner: Ruth McInroy
Attorney: Pearson & Pearson, LLP.
Application Number: 29/307,852