SMITH & NEPHEW SIGMA, INC.

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4893991 Method and means for improving efficiency of peristaltic pumpsExpiredOct 19, 88Jan 16, 90[F04B]
4877034 Method and device for detection of tissue infiltrationExpiredJun 18, 87Oct 31, 89[A61B]

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