USD521147SExpiredUtility

Portion of ductwork

65
Assignee: LANGDON INCPriority: Mar 24, 2005Filed: Mar 24, 2005Granted: May 16, 2006
Est. expiryMar 24, 2025(expired)· nominal 20-yr term from priority
Inventors:Michael N. SandmanJoseph P. Sandman
65
PatentIndex Score
15
Cited by
75
References
1
Claims

Claims

exact text as granted — not AI-modified
CLAIM 
     
       The ornamental design for a portion of ductwork, as shown and described.

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