Invention Grant
- Patent Title: Trunk circuit
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Application No.: US19326350Application Date: 1950-10-31
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Publication No.: US2590945APublication Date: 1952-04-01
- Inventor: CURTIS ROBERT B
- Applicant: BELL TELEPHONE LABOR INC
- Assignee: Nokia Bell Labs
- Current Assignee: Nokia Bell Labs
- Priority: US19326350 1950-10-31
- Main IPC: H04M3/60
- IPC: H04M3/60 ; H04Q3/00
Information query
