Patent search ap:("BELL TELEPHONE LABOR INC") AND inv:"BENSON MILTON L" Page 1

1.

发明授权
Registration control circuit 失效
Title translation: 注册控制电路

公开(公告)号：US3050588A

公开(公告)日：1962-08-21

申请号：US64560

申请日：1960-01-05

Applicant: BELL TELEPHONE LABOR INC

Inventor： BENSON MILTON L , CHARLES BREEN

IPC: H04M1/272 , H04M1/2745 , H04Q3/00

CPC classification number: H04Q3/0004 , H04M1/272 , H04M1/274591

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