CN209835434U - 混凝土井筒提升装置 - Google Patents
混凝土井筒提升装置 Download PDFInfo
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GR01 | Patent grant | ||
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Effective date of registration: 20200107 Address after: 230009 No.110, Huizhou Avenue, Hefei City, Anhui Province Co-patentee after: China Coal Third Construction (Group) Co., Ltd. Patentee after: China Coal Special Drilling Engineering Co., Ltd. Address before: 230009 No.110, Huizhou Avenue, Hefei City, Anhui Province Patentee before: China Coal Special Drilling Engineering Co., Ltd. |
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CP02 | Change in the address of a patent holder | ||
CP02 | Change in the address of a patent holder |
Address after: 235000 No. 131 Dongshan Road, Anhui, Huaibei Co-patentee after: CHINA COAL NO.3 CONSTRUCTION (GROUP) CORPORATION Co.,Ltd. Patentee after: CHINA COAL SPECIAL DRILLING ENGINEERING Co.,Ltd. Address before: 230009 No.110, Huizhou Avenue, Hefei City, Anhui Province Co-patentee before: CHINA COAL NO.3 CONSTRUCTION (GROUP) CORPORATION Co.,Ltd. Patentee before: CHINA COAL SPECIAL DRILLING ENGINEERING Co.,Ltd. |