Protractor (rotating angle measuring teaching aid)

CN310070688SActive Publication Date: 2026-07-03冉高雁
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Patent Information

Application Number
CN202530785117.4
Authority / Receiving Office
CN · China
Patent Type
Designs(China)
Current Assignee / Owner
Filing Date
2025-12-31
Publication Date
2026-07-03
Estimated Expiration
2040-12-31

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Abstract

1. Name of the product in this design: Protractor (Rotating Angle Measuring Teaching Aid). 2. Purpose of this design: It is used for a protractor and is a mathematical teaching tool. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: a 3D model.
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