Patent search ap:("BELL TELEPHONE LABOR INC") AND inv:"BOYLE WILLARD S" Page 2

11.

发明授权
Electrostatic relay 失效

公开(公告)号：US2802918A

公开(公告)日：1957-08-13

申请号：US50479655

申请日：1955-04-29

Applicant: BELL TELEPHONE LABOR INC

Inventor： BOYLE WILLARD S

IPC: H01H29/00 , H01H59/00

CPC classification number: H01H29/00 , H01H59/00 , Y10T74/1261 , Y10T74/1271

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