Patent search ap:("BELL TELEPHONE LABOR INC") AND inv:"DEARBORN ERNEST F" Page 1

1.

发明授权
Resistance material and method of making the same 失效
Title translation: 电阻材料和制作方法

公开(公告)号：US2274592A

公开(公告)日：1942-02-24

申请号：US28069239

申请日：1939-06-23

Applicant: BELL TELEPHONE LABOR INC

Inventor： DEARBORN ERNEST F

IPC: H01C7/04

CPC classification number: H01C7/043

2.

发明授权
Resistance composition and method of making it 失效
Title translation: 电阻组成及其制作方法

公开(公告)号：US2282944A

公开(公告)日：1942-05-12

申请号：US33673440

申请日：1940-05-23

Applicant: BELL TELEPHONE LABOR INC

Inventor： DEARBORN ERNEST F , PEARSON GERALD L

IPC: H01C7/04

CPC classification number: H01C7/043

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