CN211973650U - 一种水利用防堵管道结构 - Google Patents
一种水利用防堵管道结构 Download PDFInfo
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- CN211973650U CN211973650U CN202020353564.4U CN202020353564U CN211973650U CN 211973650 U CN211973650 U CN 211973650U CN 202020353564 U CN202020353564 U CN 202020353564U CN 211973650 U CN211973650 U CN 211973650U
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Legal Events
Date | Code | Title | Description |
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GR01 | Patent grant | ||
GR01 | Patent grant | ||
CB03 | Change of inventor or designer information | ||
CB03 | Change of inventor or designer information |
Inventor after: Zeng Dexian Inventor after: Dai Yu Hua Inventor before: Dai Yu Hua |
|
TR01 | Transfer of patent right | ||
TR01 | Transfer of patent right |
Effective date of registration: 20201217 Address after: No. 40, dunxia Road, East Avenue, Fengcheng street, Yongding District, Longyan City, Fujian Province, 364000 Patentee after: Fujian Qingyu Engineering Management Co.,Ltd. Address before: 122300 no.41-22 Changsheng street, Dachengzi Town, Kazuo County, Chaoyang City, Liaoning Province Patentee before: Dai Yu Hua |
|
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: 20201120 |