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公开(公告)号：US3022374A
公开(公告)日：1962-02-20
申请号：US78127847
申请日：1947-10-22
Applicant: BELL TELEPHONE LABOR INC
Inventor： BRATTAIN WALTER H , WADE NEILL G
IPC: G01J5/00
CPC classification number: G01J5/02 , G01J5/025 , G01J5/04 , G01J5/047 , G01J5/24 , G01J2005/0081 , G01J2005/066
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