CN209556080U - 一种可周转预制混凝土排水沟 - Google Patents
一种可周转预制混凝土排水沟 Download PDFInfo
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- CN209556080U CN209556080U CN201822047757.2U CN201822047757U CN209556080U CN 209556080 U CN209556080 U CN 209556080U CN 201822047757 U CN201822047757 U CN 201822047757U CN 209556080 U CN209556080 U CN 209556080U
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CN201822047757.2U CN209556080U (zh) | 2018-12-07 | 2018-12-07 | 一种可周转预制混凝土排水沟 |
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CN201822047757.2U CN209556080U (zh) | 2018-12-07 | 2018-12-07 | 一种可周转预制混凝土排水沟 |
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CN113047396A (zh) * | 2021-04-24 | 2021-06-29 | 南京润华建设集团有限公司 | 一种新旧污水管道连接结构及施工方法 |
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Publication number | Priority date | Publication date | Assignee | Title |
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CN113047396A (zh) * | 2021-04-24 | 2021-06-29 | 南京润华建设集团有限公司 | 一种新旧污水管道连接结构及施工方法 |
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GR01 | Patent grant | ||
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CB03 | Change of inventor or designer information |
Inventor after: Liu Haizheng Inventor after: Ji Rongfeng Inventor after: Ma Lei Inventor after: Wang Kai Inventor after: Li Zhisong Inventor after: Wang Haishuai Inventor before: Liu Haizheng Inventor before: Ma Lei Inventor before: Wang Kai Inventor before: Li Zhisong Inventor before: Wang Haishuai |
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CB03 | Change of inventor or designer information | ||
CP03 | Change of name, title or address |
Address after: Building 1, Nord center, No.128, South Fourth Ring Road West, Fengtai District, Beijing, 100070 Patentee after: China Railway Construction Engineering Group Patentee after: China Railway Construction Group No.2 Construction Co.,Ltd. Address before: 100000 South Fourth Ring Road, Fengtai District, Fengtai District, Beijing Patentee before: China Railway Construction Engineering Group Patentee before: CHINA RAILWAY CONSTRUCTION ENGINEERING GROUP SHANDONG Co.,Ltd. |
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CP03 | Change of name, title or address | ||
CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191029 |
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CF01 | Termination of patent right due to non-payment of annual fee |