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公开(公告)号：US1952640A
公开(公告)日：1934-03-27
申请号：US63495332
申请日：1932-09-26
Applicant: VENTRESS ROBERT E , MULVILL JOSEPH C
Inventor： VENTRESS ROBERT E , MULVILL JOSEPH C
CPC classification number: F04B53/127 , F04B5/02 , F04B9/02 , F04B9/14 , F04B53/103 , F04B53/166 , F05C2201/0475 , F05C2201/0478
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