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公开(公告)号：US3046420A
公开(公告)日：1962-07-24
申请号：US78431158
申请日：1958-12-31
Applicant: STANDARD OIL CO
Inventor： ALLEN RITZENTHALER BRUCE
IPC: H04M19/02
CPC classification number: H04M19/02 , Y10T307/872
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公开(公告)号：US3020749A
公开(公告)日：1962-02-13
申请号：US78423358
申请日：1958-12-31
Applicant: STANDARD OIL CO
Inventor： CROPPER WENDELL P , ALLEN RITZENTHALER BRUCE
IPC: G01N11/06
CPC classification number: G01N11/06
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