USD310276SExpiredUtility

Welding mask

81
Assignee: OPTREL AGPriority: Jul 21, 1988Filed: Jul 21, 1988Granted: Aug 28, 1990
Est. expiryJul 21, 2008(expired)· nominal 20-yr term from priority
Inventors:Rupert FuerthbauerHans Huesler
81
PatentIndex Score
26
Cited by
4
References
1
Claims

Claims

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

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