Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.

Patents

  1. Advanced Patent Search
Publication numberUSD520684 S1
Publication typeGrant
Application numberUS 29/212,629
Publication dateMay 9, 2006
Filing dateSep 3, 2004
Priority dateSep 3, 2004
Publication number212629, 29212629, US D520684 S1, US D520684S1, US-S1-D520684, USD520684 S1, USD520684S1
InventorsEdward L. Martin, James Watkins
Original AssigneeOptical Engineering Company, Llc
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Protective helmet
US D520684 S1
Images(8)
Previous page
Next page
Claims(1)
  1. We claim the ornamental design for a protective helmet, as shown and described.
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.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US8534279Mar 2, 2009Sep 17, 20133M Innovative Properties CompanyRespirator system including convertible head covering member
Classifications
U.S. ClassificationD29/110