Patent
   D479631
Priority
Nov 15 2002
Filed
Nov 15 2002
Issued
Sep 09 2003
Expiry
Sep 09 2017
Assg.orig
Entity
unknown
0
6
n/a
The ornamental design for a welding helmet, as shown and described.

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

FIG. 2 is a front side elevation view thereof;

FIG. 3 is a rear side elevation view thereof;

FIG. 4 is a right side elevation view thereof;

FIG. 5 is a left side elevation view thereof;

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

FIG. 7 is a bottom plan view thereof.

Cheng, Chen-San

Patent Priority Assignee Title
Patent Priority Assignee Title
3257667,
4185328, Jan 17 1977 Sight and vision protection for arc welding helmet
5191468, Jun 05 1989 3M Innovative Properties Company Welder's helmet
6507954, Aug 06 1999 Mechanical visual protector for welding application
D394732, Apr 10 1996 Otos Optical Co. Ltd. Welding mask
D398421, Dec 12 1995 3M Innovative Properties Company Protective helmet
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Nov 12 2002CHENG, CHEN-SANPolison CorporationASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS 0135020315 pdf
Nov 15 2002Polison Corporation(assignment on the face of the patent)
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