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公开(公告)号：US1831150A
公开(公告)日：1931-11-10
申请号：US47451030
申请日：1930-08-11
Applicant: VELTON STEPHEN J
Inventor： VELTON STEPHEN J
CPC classification number: F02B25/12 , F02B75/20 , Y10T74/18208
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公开(公告)号：US1859687A
公开(公告)日：1932-05-24
申请号：US51267631
申请日：1931-01-31
Applicant: VELTON STEPHEN J
Inventor： VELTON STEPHEN J
IPC: F01L1/42
CPC classification number: F01L1/42
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