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公开(公告)号：US1163664A
公开(公告)日：1915-12-14
申请号：US1910553547
申请日：1910-04-05
Applicant: COOPER HEWITT ELECTRIC CO
Inventor： HEWITT PETER COOPER
CPC classification number: H01J41/04
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公开(公告)号：US776563A
公开(公告)日：1904-12-06
申请号：US1903206576
申请日：1903-02-04
Applicant: COOPER HEWITT ELECTRIC CO
Inventor： THOMAS PERCY H
CPC classification number: H01J41/04
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