AVA INTERNATIONAL CORPORATION

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5295907 Rorque limiting deviceExpiredDec 09, 92Mar 22, 94[F16K, F16D]
4745971 Multiple string well packerExpiredJun 03, 85May 24, 88[F21B]
4726421 Latching devicesExpiredMar 17, 87Feb 23, 88[E21B]
4605064 Well apparatusExpiredMar 05, 85Aug 12, 86[E21B]
4505331 Side pocket mandrelExpiredNov 08, 82Mar 19, 85[E21B]
4488595 Well tool having a slip assemblyExpiredJun 23, 83Dec 18, 84[E21B]
4467866 Flow controlling apparatusExpiredMar 17, 82Aug 28, 84[E21B]
4440223 Well slip assembliesExpiredOct 22, 82Apr 03, 84[E21B]
4434847 Flow controlling apparatusExpiredMar 17, 82Mar 06, 84[E21B]
4407363 Subsurface well apparatusExpiredFeb 17, 81Oct 04, 83[E21B]
4393929 Well packers and slip assemblies for use therewithExpiredFeb 17, 81Jul 19, 83[E21B]

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