Patent search ap:("BELL TELEPHONE LABOR INC") AND inv:"LIMIERO ALBERT D" Page 1

1.

发明授权
Key telephone control systems 失效
Title translation: 主要电话控制系统

公开(公告)号：US3395256A

公开(公告)日：1968-07-30

申请号：US47567665

申请日：1965-07-29

Applicant: BELL TELEPHONE LABOR INC

Inventor： LIMIERO ALBERT D , MCEOWEN JAMES R , SPENCER JONATHAN A

IPC: H04M3/428

CPC classification number: H04M3/4283

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