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公开(公告)号:US2594923A
公开(公告)日:1952-04-29
申请号:US3341448
申请日:1948-06-16
Applicant: BELL TELEPHONE LABOR INC
Inventor: HERSEY RALPH E , EDWARD VROOM
IPC: H04M15/38
CPC classification number: H04M15/38
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公开(公告)号:US2580093A
公开(公告)日:1951-12-25
申请号:US79204647
申请日:1947-12-16
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:US2494475A
公开(公告)日:1950-01-10
申请号:US59026045
申请日:1945-04-25
Applicant: BELL TELEPHONE LABOR INC
Inventor: HERSEY RALPH E
CPC classification number: H04M1/26 , H04Q3/0004
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公开(公告)号:US2484224A
公开(公告)日:1949-10-11
申请号:US71191346
申请日:1946-11-23
Applicant: BELL TELEPHONE LABOR INC
Inventor: HERSEY RALPH E
IPC: H03K23/74
CPC classification number: H03K23/74
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公开(公告)号:US2452051A
公开(公告)日:1948-10-26
申请号:US58289345
申请日:1945-03-15
Applicant: BELL TELEPHONE LABOR INC
Inventor: HERSEY RALPH E
IPC: H03K23/74
CPC classification number: H03K23/74
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公开(公告)号:US2392089A
公开(公告)日:1946-01-01
申请号:US54176444
申请日:1944-06-23
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:US2384620A
公开(公告)日:1945-09-11
申请号:US56259944
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:US2261370A
公开(公告)日:1941-11-04
申请号:US33524140
申请日:1940-05-15
Applicant: BELL TELEPHONE LABOR INC
Inventor: HERSEY RALPH E , KOPP OTTMAN H , NEWSOM JAMES B
CPC classification number: H04Q3/00 , H04M3/60 , H04Q3/0004
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公开(公告)号:US2227488A
公开(公告)日:1941-01-07
申请号:US21435438
申请日:1938-06-17
Applicant: BELL TELEPHONE LABOR INC
Inventor: COLLIS RAYMOND E , DEHN JOSEPH W , HERSEY RALPH E , NEWSOM JAMES B
IPC: H04Q3/00
CPC classification number: H04Q3/0004
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公开(公告)号:US2196250A
公开(公告)日:1940-04-09
申请号:US21435238
申请日:1938-06-17
Applicant: BELL TELEPHONE LABOR INC
Inventor: COLLIS RAYMOND E , HERSEY RALPH E , NEWSOM JAMES B
IPC: H04M3/24
CPC classification number: H04M3/248
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