USD499215SExpiredUtility
Welding helmet
Est. expiryDec 29, 2023(expired)· nominal 20-yr term from priority
Inventors:Chen-San Cheng
77
PatentIndex Score
23
Cited by
10
References
1
Claims
Claims
exact text as granted — not AI-modifiedThe ornamental design for a welding helmet, as shown and described.
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