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公开(公告)号：US1713424A
公开(公告)日：1929-05-14
申请号：US20959227
申请日：1927-07-30
Applicant: OIL PRODUCTS APPLIANCE CO
Inventor： DAVENPORT ARTHUR E
IPC: F04B9/14
CPC classification number: F04B9/14
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公开(公告)号：US1715281A
公开(公告)日：1929-05-28
申请号：US30885628
申请日：1928-09-27
Applicant: OIL PRODUCTS APPLIANCE CO
Inventor： DAVENPORT ARTHUR E
IPC: G01P13/00
CPC classification number: G01P13/008
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