Educational acids for the teaching of mathematics
IL54258A0Inactive Publication Date: 1978-06-15דבורה קיפר
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Patent Information
- Application Number
- IL54258
- Authority / Receiving Office
- IL · IL
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 1978-03-13
- Publication Date
- 1978-06-15
- Estimated Expiration
- Not applicable · inactive patent
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