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11.发明授权Electronic system for operating direct-current motors from an alternating current supply 失效用于从交流电源运行直流电动机的电子系统
公开(公告)号：US2504155A
公开(公告)日：1950-04-18
申请号：US2519448
申请日：1948-05-05
Applicant: WESTINGHOUSE ELECTRIC CORP
Inventor： ROMAN WALTER G
IPC: B65H23/198
CPC classification number: B65H23/198
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12.发明授权Electronic system for operating direct-current motors from an alternating-current supply 失效用于从交流电源运行直流电动机的电子系统
公开(公告)号：US2504123A
公开(公告)日：1950-04-18
申请号：US2942648
申请日：1948-05-27
Applicant: WESTINGHOUSE ELECTRIC CORP
Inventor： HANEIKE JOHN G , ROMAN WALTER G
IPC: H02P7/26
CPC classification number: H02P7/265 , Y10S388/913
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