A lock out,party-line telephone system
IL31956A0Inactive Publication Date: 1969-06-25מדינת ישראל, משרד הדואר
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Patent Information
- Application Number
- IL31956
- Authority / Receiving Office
- IL · IL
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 1969-04-04
- Publication Date
- 1969-06-25
- Estimated Expiration
- Not applicable · inactive patent
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