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

1.

发明授权
Unattended automatic dialing of telephone numbers 失效
Title translation: 无人值守的自动拨号电话号码

公开(公告)号：US3301957A

公开(公告)日：1967-01-31

申请号：US24276562

申请日：1962-12-06

Applicant: BELL TELEPHONE LABOR INC

Inventor： GERMOND PAUL J , MAYER KARL L

IPC: G06F3/16 , H04M1/27

CPC classification number: H04M1/27 , G06F3/16 , Y10S379/904

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