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公开(公告)号：US1074456A
公开(公告)日：1913-09-30
申请号：US1909510196
申请日：1909-07-29
Applicant: GEN ELECTRIC
Inventor： PERKINS HARRY F
CPC classification number: H03B11/02
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公开(公告)号：US1240772A
公开(公告)日：1917-09-18
申请号：US2127115
申请日：1915-04-14
Applicant: GEN ELECTRIC
Inventor： PERKINS HARRY F
CPC classification number: H01J13/10
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公开(公告)号：US1160750A
公开(公告)日：1915-11-16
申请号：US1913765448
申请日：1913-05-05
Applicant: GEN ELECTRIC
Inventor： PERKINS HARRY F
CPC classification number: H02M1/045 , G05F1/42 , Y10T307/571
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