CN207573534U - 钻井井场指针式仪表摄像及读数装置 - Google Patents
钻井井场指针式仪表摄像及读数装置 Download PDFInfo
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- CN207573534U CN207573534U CN201721834976.4U CN201721834976U CN207573534U CN 207573534 U CN207573534 U CN 207573534U CN 201721834976 U CN201721834976 U CN 201721834976U CN 207573534 U CN207573534 U CN 207573534U
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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WO2020019287A1 (en) * | 2018-07-27 | 2020-01-30 | Linde Aktiengesellschaft | Attachable gauge reading device |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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WO2020019287A1 (en) * | 2018-07-27 | 2020-01-30 | Linde Aktiengesellschaft | Attachable gauge reading device |
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Legal Events
Date | Code | Title | Description |
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GR01 | Patent grant | ||
GR01 | Patent grant | ||
TR01 | Transfer of patent right | ||
TR01 | Transfer of patent right |
Effective date of registration: 20210915 Address after: 100007 No. 9 North Main Street, Dongcheng District, Beijing, Dongzhimen Patentee after: CHINA NATIONAL PETROLEUM Corp. Patentee after: CNPC Bohai Drilling Engineering Co.,Ltd. Address before: 300457 Tianjin Binhai New Area Development Zone Second Avenue 83, China Petroleum Tianjin building Bohai Drilling Engineering Co., Ltd. Patentee before: CNPC Bohai Drilling Engineering Co.,Ltd. |
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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: 20180703 Termination date: 20211225 |