CN211041504U - 一种二氧化碳制冷工质的人工冰场系统 - Google Patents
一种二氧化碳制冷工质的人工冰场系统 Download PDFInfo
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CN110160301A (zh) * | 2019-05-29 | 2019-08-23 | 天津大学 | 一种二氧化碳制冷工质的人工冰场系统 |
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CN110160301A (zh) * | 2019-05-29 | 2019-08-23 | 天津大学 | 一种二氧化碳制冷工质的人工冰场系统 |
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CB03 | Change of inventor or designer information | ||
CB03 | Change of inventor or designer information |
Inventor after: Wang Pai Inventor after: Ma Yitai Inventor after: Zhang Qichao Inventor after: Li Minxia Inventor after: Zhan Haomiao Inventor after: Ma Xiaofeng Inventor before: Ma Yitai Inventor before: Wang Pai Inventor before: Zhang Qichao Inventor before: Li Minxia Inventor before: Zhan Haomiao Inventor before: Ma Xiaofeng |
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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: 20200717 Termination date: 20210529 |