Invention Grant
- Patent Title: Coin telephone antifraud circuit
- Patent Title (中): 硬币电话防盗电路
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Application No.: US3428751DApplication Date: 1966-01-28
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Publication No.: US3428751APublication Date: 1969-02-18
- Inventor: EDINGTON JOHN E
- Applicant: BELL TELEPHONE LABOR INC
- Assignee: Nokia Bell Labs
- Current Assignee: Nokia Bell Labs
- Priority: US52359466 1966-01-28
- Main IPC: H04M17/02
- IPC: H04M17/02
Information query
