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公开(公告)号：US2926279A
公开(公告)日：1960-02-23
申请号：US66917557
申请日：1957-07-01
Applicant: NAT RES DEV
Inventor： WINSTON GALLOP JOHN
IPC: H05H9/02
CPC classification number: H05H9/02
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公开(公告)号：US2903578A
公开(公告)日：1959-09-08
申请号：US38699553
申请日：1953-10-19
Applicant: NAT RES DEV
Inventor： WINSTON GALLOP JOHN
IPC: H05H9/02
CPC classification number: H05H9/02
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