CN204605295U - 高中生立体几何绘图板 - Google Patents
高中生立体几何绘图板 Download PDFInfo
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- CN204605295U CN204605295U CN201520352636.2U CN201520352636U CN204605295U CN 204605295 U CN204605295 U CN 204605295U CN 201520352636 U CN201520352636 U CN 201520352636U CN 204605295 U CN204605295 U CN 204605295U
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CN201520352636.2U CN204605295U (zh) | 2015-05-20 | 2015-05-20 | 高中生立体几何绘图板 |
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CN201520352636.2U CN204605295U (zh) | 2015-05-20 | 2015-05-20 | 高中生立体几何绘图板 |
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CN204605295U true CN204605295U (zh) | 2015-09-02 |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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CN110126517A (zh) * | 2019-05-27 | 2019-08-16 | 陕西理工大学 | 一种有助于教学的高等数学绘图仪 |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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CN110126517A (zh) * | 2019-05-27 | 2019-08-16 | 陕西理工大学 | 一种有助于教学的高等数学绘图仪 |
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Legal Events
Date | Code | Title | Description |
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C14 | Grant of patent or utility model | ||
GR01 | Patent grant | ||
C41 | Transfer of patent application or patent right or utility model | ||
CB03 | Change of inventor or designer information |
Inventor after: Jiang Qianrun Inventor after: Liu Yi Inventor before: Jiang Qianrun |
|
COR | Change of bibliographic data | ||
TR01 | Transfer of patent right |
Effective date of registration: 20160505 Address after: 063000 Xiang Fu 602-5-101, North Road, Hebei, Tangshan City Patentee after: Jiang Qianrun Patentee after: Liu Yi Address before: 063000 Xiang Fu 602-5-101, North Road, Hebei, Tangshan City Patentee before: Jiang Qianrun |
|
CF01 | Termination of patent right due to non-payment of annual fee | ||
CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150902 Termination date: 20160520 |