-
公开(公告)号:US2264393A
公开(公告)日:1941-12-02
申请号:US36224840
申请日:1940-10-22
Applicant: BELL TELEPHONE LABOR INC
Inventor: MCCURDY RALPH G , DOREN MITCHELL
IPC: H04B3/54
CPC classification number: H04B3/544
公开(公告)号:US2264393A
公开(公告)日:1941-12-02
申请号:US36224840
申请日:1940-10-22
Applicant: BELL TELEPHONE LABOR INC
Inventor: MCCURDY RALPH G , DOREN MITCHELL
IPC: H04B3/54
CPC classification number: H04B3/544