Method for operating a telephone exchange
IL59431A0Inactive Publication Date: 1980-05-30AKSELROD B
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Patent Information
- Application Number
- IL594
- Authority / Receiving Office
- IL · IL
- Patent Type
- Applications
- Current Assignee / Owner
- Priority Date
- 1979-02-21
- Filing Date
- 1980-02-20
- Publication Date
- 1980-05-30
- Estimated Expiration
- Not applicable · inactive patent
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