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公开(公告)号:US3159771A
公开(公告)日:1964-12-01
申请号:US15241761
申请日:1961-11-15
Applicant: SQUARE D CO
Inventor: DUVALL HAROLD A
IPC: H02B1/056
CPC classification number: H02B1/056
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公开(公告)号:US2917083A
公开(公告)日:1959-12-15
申请号:US31617752
申请日:1952-10-22
Applicant: SQUARE D CO
Inventor: DUVALL HAROLD A , ERNEST MILLER
IPC: H02G3/06
CPC classification number: H02G3/0608
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公开(公告)号:US2984447A
公开(公告)日:1961-05-16
申请号:US74843758
申请日:1958-07-14
Applicant: SQUARE D CO
Inventor: DUVALL HAROLD A , ERNEST MILLER
CPC classification number: H02G3/263 , Y10T403/4602
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公开(公告)号:US2208007A
公开(公告)日:1940-07-16
申请号:US19194638
申请日:1938-02-23
Applicant: SQUARE D CO
Inventor: MAECHTLEN LAWRENCE G , DUVALL HAROLD A
IPC: H05K5/04
CPC classification number: H05K5/04
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公开(公告)号:US2445358A
公开(公告)日:1948-07-20
申请号:US59727845
申请日:1945-06-02
Applicant: SQUARE D CO
Inventor: MAECHTLEN LAWRENCE G , DUVALL HAROLD A , ESLER CHARLES G
IPC: F16L41/10
CPC classification number: F16L41/10
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公开(公告)号:US2186342A
公开(公告)日:1940-01-09
申请号:US14377637
申请日:1937-05-20
Applicant: SQUARE D CO
Inventor: PENGILLY JOSEPH H , MOYEN JOHN G , DUVALL HAROLD A , MAECHTLEN LAWRENCE G
IPC: H01H71/74
CPC classification number: H01H71/7409
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公开(公告)号:US3472982A
公开(公告)日:1969-10-14
申请号:US3472982D
申请日:1966-07-29
Applicant: SQUARE D CO
Inventor: DUVALL HAROLD A , WILLIAMS ALBERT J
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8.
公开(公告)号:US3376400A
公开(公告)日:1968-04-02
申请号:US43857565
申请日:1965-03-10
Applicant: SQUARE D CO
Inventor: BATT THOMAS N , DUVALL HAROLD A
IPC: H01H9/28
CPC classification number: H01H9/283 , Y10T70/5779
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公开(公告)号:US3263130A
公开(公告)日:1966-07-26
申请号:US32526163
申请日:1963-11-21
Applicant: SQUARE D CO
Inventor: DUVALL HAROLD A
IPC: G01R11/04
CPC classification number: G01R11/04
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公开(公告)号:US2789169A
公开(公告)日:1957-04-16
申请号:US52169655
申请日:1955-07-13
Applicant: SQUARE D CO
Inventor: DUVALL HAROLD A , ESLER CHARLES G
IPC: H02B1/056
CPC classification number: H02B1/056
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