Patent search ap:("INT STANDARD ELECTRIC CORP") AND inv:"CHARLES BERDEN AMEDIE" Page 1

1.

发明授权
Class of line indication in telephone systems 失效
Title translation: 电话系统中的线路指示类

公开(公告)号：US2593419A

公开(公告)日：1952-04-22

申请号：US74985047

申请日：1947-05-22

Applicant: INT STANDARD ELECTRIC CORP

Inventor： DEN HERTOG MARTINUS , CHARLES BERDEN AMEDIE

IPC: H04Q3/62

CPC classification number: H04Q3/625

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