USD836847SActiveUtility

Auto darkening filter for a welding helmet

64
Assignee: TECMEN ELECTRONICS CO LTDPriority: Oct 17, 2016Filed: Mar 10, 2017Granted: Dec 25, 2018
Est. expiryOct 17, 2036(~10.2 yrs left)· nominal 20-yr term from priority
Inventors:Ziqian Wu
64
PatentIndex Score
9
Cited by
20
References
1
Claims

Claims

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

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