Invention Grant
- Patent Title: Railway traffic controlling apparatus
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Application No.: US29378339Application Date: 1939-09-07
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Publication No.: US2235525APublication Date: 1941-03-18
- Inventor: LIVINGSTON JOHN W
- Applicant: UNION SWITCH & SIGNAL CO
- Assignee: Showa Denko KK,Mitsubishi Electric Corp
- Current Assignee: Showa Denko KK,Mitsubishi Electric Corp
- Priority: US29378339 1939-09-07
- Main IPC: B61L5/06
- IPC: B61L5/06
Public/Granted literature
- USD669106S1 Welding apparatus Public/Granted day:2012-10-16
Information query
