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公开(公告)号：US2992410A
公开(公告)日：1961-07-11
申请号：US56840556
申请日：1956-02-28
Applicant: BELL TELEPHONE LABOR INC
Inventor： GROTH WILLARD B , SECKLER HOWARD N
CPC classification number: H04Q3/521 , H03K17/6221
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公开(公告)号：US2946984A
公开(公告)日：1960-07-26
申请号：US58833856
申请日：1956-05-31
Applicant: BELL TELEPHONE LABOR INC
Inventor： BREED ROLLAND N , GROTH WILLARD B , IRWIN GORDON C , KILLE LINDLEY A , GEORGE RIGGS
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公开(公告)号：US2780410A
公开(公告)日：1957-02-05
申请号：US26874252
申请日：1952-01-29
Applicant: BELL TELEPHONE LABOR INC
Inventor： BREED ROLLAND N , GROTH WILLARD B , IRWIN GORDON C , KILLE LINDLEY A , GEORGE RIGGS
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