Patent search ap:("INT STANDARD ELECTRIC CORP") AND inv:"WILLIAM PARRISH RALPH" Page 1

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发明授权
Telephone tone ringer 失效
Title translation: 电话铃声

公开(公告)号：US3387097A

公开(公告)日：1968-06-04

申请号：US41022064

申请日：1964-11-10

Applicant: INT STANDARD ELECTRIC CORP

Inventor： CRISP BEADLE ANTHONY , WILLIAM PARRISH RALPH

IPC: H03G3/10 , H04M19/04

CPC classification number: H04M19/04 , H03G3/10

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