USD532939SExpiredUtility

Top portion of a welding helmet

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Assignee: 3M INNOVATIVE PROPERTIES COPriority: Aug 9, 2005Filed: Aug 9, 2005Granted: Nov 28, 2006
Est. expiryAug 9, 2025(expired)· nominal 20-yr term from priority
Inventors:Oskar JuhlinNiklas LilenthalKjell I. MasesDavid CrafoordRutger BelinLennart C. FredrikssonJonas Fridholm
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PatentIndex Score
10
Cited by
37
References
1
Claims

Claims

exact text as granted — not AI-modified
CLAIM 
     
       The ornamental design for a top portion of a welding helmet, as shown and described.

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