CN203939434U - 一种滚动式刀翼的金刚石复合片钻头 - Google Patents
一种滚动式刀翼的金刚石复合片钻头 Download PDFInfo
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- CN203939434U CN203939434U CN201420398720.3U CN201420398720U CN203939434U CN 203939434 U CN203939434 U CN 203939434U CN 201420398720 U CN201420398720 U CN 201420398720U CN 203939434 U CN203939434 U CN 203939434U
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CN201420398720.3U CN203939434U (zh) | 2014-07-18 | 2014-07-18 | 一种滚动式刀翼的金刚石复合片钻头 |
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CN201420398720.3U CN203939434U (zh) | 2014-07-18 | 2014-07-18 | 一种滚动式刀翼的金刚石复合片钻头 |
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CN203939434U true CN203939434U (zh) | 2014-11-12 |
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Legal Events
Date | Code | Title | Description |
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C14 | Grant of patent or utility model | ||
GR01 | Patent grant | ||
CP01 | Change in the name or title of a patent holder | ||
CP01 | Change in the name or title of a patent holder |
Address after: 611130 Wenjiang District, Chengdu, Sichuan, No. 123, Xingxin Road, Chengdu science and technology development park across the Taiwan Strait. Patentee after: Sichuan Bao Wright drill Co., Ltd. Address before: 611130 Wenjiang District, Chengdu, Sichuan, No. 123, Xingxin Road, Chengdu science and technology development park across the Taiwan Strait. Patentee before: Sino-Canada Chengdu Bright Bits Ltd. |
|
CP02 | Change in the address of a patent holder | ||
CP02 | Change in the address of a patent holder |
Address after: 611130 No. 30, West Section of Second Ring Road, Tianyuan Town, Zheyang District, Deyang City, Sichuan Province Patentee after: Sichuan Bao Wright drill Co., Ltd. Address before: 611130 Wenjiang District, Chengdu, Sichuan, No. 123, Xingxin Road, Chengdu science and technology development park across the Taiwan Strait. Patentee before: Sichuan Bao Wright drill Co., Ltd. |