USD681980SActiveUtility

Asymmetric coil spring

88
Assignee: DEFRANKS MICHAEL SPriority: Oct 29, 2007Filed: Jan 24, 2011Granted: May 14, 2013
Est. expiryOct 29, 2027(~1.3 yrs left)· nominal 20-yr term from priority
Inventors:Michael S. Defranks
A47C 23/0438A47C 27/064A47C 27/065
88
PatentIndex Score
15
Cited by
5
References
1
Claims

Claims

exact text as granted — not AI-modified
CLAIM 
     
       The ornamental design for an asymmetric coil spring, as shown and described.

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