F04C 2/113

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Patent/Pub #TitleFiling DateIssue/Publication DatePatent Owner
4824347 Internal gear machine with reinforced housingSep 24, 87Apr 25, 89PARKER INTANGIBLES, LLC
4699577 Internal gear device with improved rotary valveMay 06, 86Oct 13, 87PARKER-HANNIFIN CORPORATION, PARKER INTANGIBLES, LLC,
4563136 High torque low speed hydraulic motor with rotary valvingApr 12, 85Jan 07, 86PARKER HANNIFIN CUSTOMER SUPPORT INC.
4411607 Internal gear machine with rotary pressure balanced valve discApr 15, 81Oct 25, 83G. L. Rexroth GmbH
4380420 Internal gear machine with rotary valve diskOct 07, 81Apr 19, 83Rexroth GmbH