USD308416SExpiredUtility

Solar powered ventilating fan for welding helmets

Individually held — no corporate assignee on recordPriority: Aug 21, 1987Filed: Aug 21, 1987Granted: Jun 5, 1990

Est. expiryAug 21, 2007(expired)· nominal 20-yr term from priority

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exact text as granted — not AI-modified

The ornamental design for a solar powered ventilating fan for welding helmets, as shown and described.

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