F04B 1/28

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Patent/Pub #TitleFiling DateIssue/Publication DatePatent Owner
2022/0018,341 CYLINDER DRIVE DEVICE AND FLOW CHANNEL UNITOct 10, 19Jan 20, 22SMC Corporation
2019/0331,100 ADAPTIVE CONTROL SYSTEM AND METHODS FOR WELL SERVICE PUMP SYSTEMSApr 26, 19Oct 31, 19Not available
2017/0030,344 End of Stroke Detection for Plunger Velocity CorrectionJul 27, 15Feb 02, 17CATERPILLAR INC.
2016/0245,266 PISTON SHIFTING CONTROL SYSTEMFeb 15, 16Aug 25, 16Not available
2016/0146,198 Metering PumpJun 23, 14May 26, 16Not available