发明授权
US3491207A Subscriber's two-wire line including carrier telephone communication system
失效
订户的两条线路,包括运营商电话通信系统
- 专利标题: Subscriber's two-wire line including carrier telephone communication system
- 专利标题(中): 订户的两条线路,包括运营商电话通信系统
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申请号: US3491207D申请日: 1965-10-07
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公开(公告)号: US3491207A公开(公告)日: 1970-01-20
- 发明人: BIRCK MICHAEL J
- 申请人: SUPERIOR CONTINENTAL CORP
- 专利权人: Superior Continental Corp
- 当前专利权人: Superior Continental Corp
- 优先权: US49386265 1965-10-07
- 主分类号: H04J1/20
- IPC分类号: H04J1/20 ; H04J3/02
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