Patent search ap:("BELL TELEPHONE LABOR INC") AND inv:"FORGE JR LOUIS H LA" Page 1

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发明授权
Ballast lamp 失效
Title translation: 镇流灯

公开(公告)号：US2474473A

公开(公告)日：1949-06-28

申请号：US72500647

申请日：1947-01-29

Applicant: BELL TELEPHONE LABOR INC

Inventor： ELLIS WILLIAM C , FORGE JR LOUIS H LA , WHITE ADDISON H

IPC: C22C19/07 , H01C3/04

CPC classification number: H01C3/04 , C22C19/07

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