Patent search ap:("BELL TELEPHONE LABOR INC") AND inv:"MATHEWS WARREN E" Page 1

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发明授权
Wave transmission amplifier 失效
Title translation: 波传输放大器

公开(公告)号：US2608623A

公开(公告)日：1952-08-26

申请号：US9991249

申请日：1949-06-18

Applicant: BELL TELEPHONE LABOR INC

Inventor： CUTLER CASSIUS C , MATHEWS WARREN E

IPC: F15B21/00 , H03F13/00

CPC classification number: F15B21/00 , H02K99/10 , H03F13/00 , Y10T74/22

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