US Patent D518923 Top portion of a welding helmet

Patent D518923 was granted and assigned to 3M on April, 2006 by the United States Patent and Trademark Office.

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Patent Inventor Names

Daniel Martin0

Desmond T. Curran0

Peter D. Lee0

Date of Patent

April 11, 2006

Patent Application Number

292171070

Date Filed

November 12, 2004

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