USD674150SActiveUtility

Welding helmet

91
Assignee: 3M INNOVATIVE PROPERTIES COPriority: Mar 10, 2010Filed: Aug 31, 2010Granted: Jan 8, 2013
Est. expiryMar 10, 2030(~3.7 yrs left)· nominal 20-yr term from priority
Inventors:Oskar JuhlinMartin BirathBjörn Daniels
91
PatentIndex Score
49
Cited by
46
References
1
Claims

Claims

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

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