USD309509SExpiredUtility
Helmet
Individually held — no corporate assignee on recordPriority: May 20, 1987Filed: May 20, 1987Granted: Jul 24, 1990
Est. expiryMay 20, 2007(expired)· nominal 20-yr term from priority
Inventors:William R. Mast
41
PatentIndex Score
8
Cited by
2
References
1
Claims
Claims
exact text as granted — not AI-modifiedThe ornamental design for a helmet, as shown and described.
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