Invention Grant
- Patent Title: Key telephone control systems
- Patent Title (中): 主要电话控制系统
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Application No.: US47567665Application Date: 1965-07-29
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Publication No.: US3395256APublication Date: 1968-07-30
- Inventor: LIMIERO ALBERT D , MCEOWEN JAMES R , SPENCER JONATHAN A
- Applicant: BELL TELEPHONE LABOR INC
- Assignee: Nokia Bell Labs
- Current Assignee: Nokia Bell Labs
- Priority: US47567665 1965-07-29
- Main IPC: H04M3/428
- IPC: H04M3/428
Information query
