IIIH
US006980860B2
(12) United States Patent ao) Patent No.: us 6,980,860 B2
Stadler et al. (45) Date of Patent: Dec. 27,2005
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FOREIGN PATENT DOCUMENTS
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* cited by examiner
Primary Examiner—Scott M. Getzow
(74) Attorney, Agent, or Firm—Michael C. Soldner; Girma
Wolde-Michael
