USD499214SExpiredUtility

Protective helmet

Assignee: POLISON CORPPriority: Sep 2, 2003Filed: Sep 2, 2003Granted: Nov 30, 2004
Est. expirySep 2, 2023(expired)· nominal 20-yr term from priority
Inventors:Chen-San Cheng
83
PatentIndex Score
31
Cited by
10
References
1
Claims

Claims

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

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