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Waste oil extraction machine

54
Assignee: ZHANG SHAOYUPriority: Jul 21, 2011Filed: Jul 21, 2011Granted: Feb 21, 2012
Est. expiryJul 21, 2031(~5 yrs left)· nominal 20-yr term from priority
Inventors:Shaoyu Zhang
54
PatentIndex Score
9
Cited by
14
References
1
Claims

Claims

exact text as granted — not AI-modified
CLAIM 
     
       The ornamental design for a waste oil extraction machine, as shown.

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