F04F 1/04

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Patent/Pub #TitleFiling DateIssue/Publication DatePatent Owner
9540959 System and method for generating electric powerOct 25, 12Jan 10, 17GENERAL ELECTRIC COMPANY
4801246 Device for elevating liquids with a plurality of intermediate containers communicating with one anotherAug 11, 87Jan 31, 89DANMIN SOFTWARE AND TECHNOLOGY INC.