System for reciprocal transmission of sub-audio ac impulses in telecommunication equipment,especially in telephone equipment
IL30318A0Inactive Publication Date: 1968-09-26SIEMENS ALBIS AG
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Patent Information
- Application Number
- IL30318
- Authority / Receiving Office
- IL · IL
- Patent Type
- Applications
- Current Assignee / Owner
- Priority Date
- 1967-07-07
- Filing Date
- 1968-07-05
- Publication Date
- 1968-09-26
- Estimated Expiration
- Not applicable · inactive patent
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