Invention Grant
- Patent Title: Circuit controller
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Application No.: US51828131Application Date: 1931-02-25
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Publication No.: US2019997APublication Date: 1935-11-05
- Inventor: SCHELLENGER NEWTON C
- Applicant: CHICAGO TELEPHONE SUPPLY CO
- Assignee: Chicago Telephone Supply Co
- Current Assignee: Chicago Telephone Supply Co
- Priority: US51828131 1931-02-25
- Main IPC: H01C3/18
- IPC: H01C3/18 ; H01C10/32
Information query
