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1.发明授权
公开(公告)号：US3420956A
公开(公告)日：1969-01-07
申请号：US3420956D
申请日：1966-01-04
Applicant: BELL TELEPHONE LABOR INC
Inventor： HEIGHTLEY JOHN D , JOHANNES VIRGIL I , MAYO JOHN S , WITT FRANCIS J
CPC classification number: H04J3/073
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Patent Agency Ranking
公开(公告)号：US3109147A
公开(公告)日：1963-10-29
申请号：US84982259
申请日：1959-10-30
Applicant: BELL TELEPHONE LABOR INC
Inventor： WITT FRANCIS J
IPC: H03H11/42
CPC classification number: H03H11/42
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公开(公告)号：US3120645A
公开(公告)日：1964-02-04
申请号：US84984359
申请日：1959-10-30
Applicant: BELL TELEPHONE LABOR INC
Inventor： SIPRESS JACK M , WITT FRANCIS J
IPC: H03H11/42
CPC classification number: H03H11/42
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4.发明授权Variolosser circuits having identical frequency selectivity at all loss settings 失效Variolosser电路在所有损耗设置下具有相同的频率选择性
公开(公告)号：US3150326A
公开(公告)日：1964-09-22
申请号：US9449361
申请日：1961-03-09
Applicant: BELL TELEPHONE LABOR INC
Inventor： WITT FRANCIS J
CPC classification number: H04B1/64 , H03G1/0052
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公开(公告)号：US3550134A
公开(公告)日：1970-12-22
申请号：US3550134D
申请日：1967-12-27
Applicant: BELL TELEPHONE LABOR INC
Inventor： KURTH CARL F , WITT FRANCIS J
CPC classification number: H04B14/006 , H03C3/09
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公开(公告)号：US3001157A
公开(公告)日：1961-09-19
申请号：US84981859
申请日：1959-10-30
Applicant: BELL TELEPHONE LABOR INC
Inventor： SIPRESS JACK M , WITT FRANCIS J
IPC: H03H11/42
CPC classification number: H03H11/42
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