CN207962116U - 一种预置式城市污水管道闭水试验用管道密封结构 - Google Patents
一种预置式城市污水管道闭水试验用管道密封结构 Download PDFInfo
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Effective date of registration: 20190505 Address after: No. 5, gaon Boulevard, high tech Zone, Chengdu, Sichuan Province Patentee after: Chengdu Duowei Mechanical and Electrical Engineering Co.,Ltd. Address before: 610000 No. 2, Building 5, Building 1, No. 6, Shenxianshu West Road, Chengdu High-tech Zone, Sichuan Province Co-patentee before: Wei Guangping Patentee before: Zhang Benyu Effective date of registration: 20190505 Address after: 610000 No. 2, Building 5, Building 1, No. 6, Shenxianshu West Road, Chengdu High-tech Zone, Sichuan Province Co-patentee after: Wei Guangping Patentee after: Zhang Benyu Address before: 212000 group two, Xiaotao village, Jian Bi Town, Jingkou District, Zhenjiang, Jiangsu, China 7 Patentee before: Ha Jianwei |
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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: 20181012 Termination date: 20191029 |