DARDIN, FRANCIS E.

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5024656 Gas-pressure-regulated needleless injection systemExpiredAug 30, 88Jun 18, 91[A61M]
4680027 Needleless hypodermic injection deviceExpiredDec 12, 85Jul 14, 87[A61M]

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