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公开(公告)号：US2094899A
公开(公告)日：1937-10-05
申请号：US66536533
申请日：1933-04-10
Applicant: ALUMINUM CO OF AMERICA
Inventor： DAVID MACINTYRE
IPC: H02G7/14
CPC classification number: H02G7/14
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公开(公告)号：US2688047A
公开(公告)日：1954-08-31
申请号：US24394751
申请日：1951-08-28
Applicant: ALUMINUM CO OF AMERICA
Inventor： DAVID MACINTYRE
IPC: H02G7/14
CPC classification number: H02G7/14
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