CN203449268U - 纤维增强复合材料防偏磨连续抽油杆的接头连接压紧装置 - Google Patents
纤维增强复合材料防偏磨连续抽油杆的接头连接压紧装置 Download PDFInfo
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- CN203449268U CN203449268U CN201320477176.7U CN201320477176U CN203449268U CN 203449268 U CN203449268 U CN 203449268U CN 201320477176 U CN201320477176 U CN 201320477176U CN 203449268 U CN203449268 U CN 203449268U
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CN201320477176.7U CN203449268U (zh) | 2013-08-07 | 2013-08-07 | 纤维增强复合材料防偏磨连续抽油杆的接头连接压紧装置 |
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CN201320477176.7U CN203449268U (zh) | 2013-08-07 | 2013-08-07 | 纤维增强复合材料防偏磨连续抽油杆的接头连接压紧装置 |
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CN201320477176.7U Expired - Lifetime CN203449268U (zh) | 2013-08-07 | 2013-08-07 | 纤维增强复合材料防偏磨连续抽油杆的接头连接压紧装置 |
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C14 | Grant of patent or utility model | ||
GR01 | Patent grant | ||
CB03 | Change of inventor or designer information | ||
CB03 | Change of inventor or designer information |
Inventor after: Song Guangqing Inventor after: Wu Xiaofa Inventor after: Gao Chao Inventor after: Li Qiang Inventor after: Wu Lei Inventor after: Song Lili Inventor before: Song Guangqing Inventor before: Wu Xiaofa Inventor before: Gao Chao Inventor before: Li Qiang Inventor before: Wu Lei Inventor before: Song Lili |
|
CP01 | Change in the name or title of a patent holder | ||
CP01 | Change in the name or title of a patent holder |
Address after: 257091, No. 221, South Road, an industrial park, Dongying Economic Development Zone, Shandong Patentee after: Shengli new big new materials Co.,Ltd. Address before: 257091, No. 221, South Road, an industrial park, Dongying Economic Development Zone, Shandong Patentee before: SHENGLI OIL FIELD XINDA PIPE INDUSTRY TECHNOLOGY DEVELOPMENT Co.,Ltd. |
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CX01 | Expiry of patent term | ||
CX01 | Expiry of patent term |
Granted publication date: 20140226 |