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公开(公告)号:US2352952A
公开(公告)日:1944-07-04
申请号:US37009840
申请日:1940-12-14
Applicant: WESTERN UNION TELEGRAPH CO
Inventor: HAGLUND HAKON H , DICKEY ALBERT W , NEWMAN THOMAS A
IPC: H03M7/40
CPC classification number: H03M7/4025
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公开(公告)号:US1931789A
公开(公告)日:1933-10-24
申请号:US39305329
申请日:1929-09-16
Applicant: WESTERN UNION TELEGRAPH CO
Inventor: DICKEY ALBERT W
IPC: G01P3/40
CPC classification number: G01P3/40
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公开(公告)号:US1827652A
公开(公告)日:1931-10-13
申请号:US38470929
申请日:1929-08-09
Applicant: WESTERN UNION TELEGRAPH CO
Inventor: HAGLUND HAKON H , DICKEY ALBERT W
IPC: H04L13/06
CPC classification number: H04L13/06
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