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公开(公告)号:US2508026A
公开(公告)日:1950-05-16
申请号:US78763347
申请日:1947-11-24
Applicant: BELL TELEPHONE LABOR INC
Inventor: HERSEY RALPH E
IPC: H04M15/08
CPC classification number: H04M15/08
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公开(公告)号:US2433366A
公开(公告)日:1947-12-30
申请号:US60435945
申请日:1945-07-11
Applicant: BELL TELEPHONE LABOR INC
Inventor: HERSEY RALPH E
IPC: H04M1/23
CPC classification number: H04M1/23
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公开(公告)号:US2431692A
公开(公告)日:1947-12-02
申请号:US59395745
申请日:1945-05-15
Applicant: BELL TELEPHONE LABOR INC
Inventor: HERSEY RALPH E
IPC: H04Q3/00
CPC classification number: H04Q3/00
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公开(公告)号:US2413708A
公开(公告)日:1947-01-07
申请号:US56259844
申请日:1944-11-09
Applicant: BELL TELEPHONE LABOR INC
Inventor: HERSEY RALPH E
IPC: H04Q3/00
CPC classification number: H04Q3/0004
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公开(公告)号:US2401352A
公开(公告)日:1946-06-04
申请号:US55299244
申请日:1944-09-07
Applicant: BELL TELEPHONE LABOR INC
Inventor: HERSEY RALPH E
IPC: H04M15/36
CPC classification number: H04M15/36
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公开(公告)号:US2392321A
公开(公告)日:1946-01-08
申请号:US53803944
申请日:1944-05-30
Applicant: BELL TELEPHONE LABOR INC
Inventor: HERSEY RALPH E
IPC: H04M1/02
CPC classification number: H04M1/02
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公开(公告)号:US2268397A
公开(公告)日:1941-12-30
申请号:US34007340
申请日:1940-06-12
Applicant: BELL TELEPHONE LABOR INC
Inventor: HERSEY RALPH E
IPC: H04M3/51
CPC classification number: H04M3/51
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公开(公告)号:US1780906A
公开(公告)日:1930-11-11
申请号:US36045829
申请日:1929-05-04
Applicant: BELL TELEPHONE LABOR INC
Inventor: CARPENTER WARREN W , HERSEY RALPH E
IPC: H04Q3/42
CPC classification number: H04Q3/42
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公开(公告)号:US2604542A
公开(公告)日:1952-07-22
申请号:US4724348
申请日:1948-09-01
Applicant: BELL TELEPHONE LABOR INC
Inventor: HERSEY RALPH E
IPC: H01H67/26
CPC classification number: H01H67/26
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公开(公告)号:US2595944A
公开(公告)日:1952-05-06
申请号:US5739748
申请日:1948-10-29
Applicant: BELL TELEPHONE LABOR INC
Inventor: HERSEY RALPH E
IPC: H04Q3/00
CPC classification number: H04Q3/0004
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