USD520684SExpiredUtility

Protective helmet

54
Assignee: OPTICAL ENGINEERING COMPANY LLPriority: Sep 3, 2004Filed: Sep 3, 2004Granted: May 9, 2006
Est. expirySep 3, 2024(expired)· nominal 20-yr term from priority
Inventors:Edward L. MartinJames Watkins
54
PatentIndex Score
9
Cited by
12
References
1
Claims

Claims

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

Cited by (0)

No later patents cite this yet.

References (0)

No backward citations on record.