Patent search ap:("BELL TELEPHONE LABOR INC") AND inv:"ROAD RICHARD A" Page 1

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发明授权
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Title translation: 选择器刷

公开(公告)号：US1859470A

公开(公告)日：1932-05-24

申请号：US52905631

申请日：1931-04-10

Applicant: BELL TELEPHONE LABOR INC

Inventor： ROAD RICHARD A , REDMOND FREDERIC J

IPC: H01H63/04

CPC classification number: H01H63/04

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