Patent search ap:("WESTERN ELECTRIC CO" OR "BELL TELEPHONE LABOR INC") AND inv:"BARTELHELM LELAND A" Page 1

1.

发明授权
Method of making selective switch banks 失效
Title translation: 选择性开关组的方法

公开(公告)号：US2444026A

公开(公告)日：1948-06-29

申请号：US49599043

申请日：1943-07-24

Applicant: WESTERN ELECTRIC CO , BELL TELEPHONE LABOR INC

Inventor： BARTELHELM LELAND A , LANE MAURICE W , MALLINA RUDOLPH F

IPC: H01H63/06

CPC classification number: H01H63/06 , Y10T29/49105

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