GD-ANKER GMBH

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5350024 Drill pipeExpiredFeb 26, 93Sep 27, 94[E21B]
5195880 Eccentric screw pump with reversible rotorExpiredMay 29, 90Mar 23, 93[F04C, F16D]
5145342 Stator for eccentric spiral pumpExpiredFeb 27, 91Sep 08, 92[F04C]
5044832 Method of and arrangement for setting anchors in loose rock ranging from cohesion-poor to non-cohesion rocksExpiredNov 29, 89Sep 03, 91[E21D]
4946314 Rock anchorExpiredAug 04, 89Aug 07, 90[E21D]

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