CN204782773U - 一种用于牙轮钻头的扁锥球形齿 - Google Patents
一种用于牙轮钻头的扁锥球形齿 Download PDFInfo
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- CN204782773U CN204782773U CN201520478435.7U CN201520478435U CN204782773U CN 204782773 U CN204782773 U CN 204782773U CN 201520478435 U CN201520478435 U CN 201520478435U CN 204782773 U CN204782773 U CN 204782773U
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Address after: 430223 Hubei city of Wuhan province science and Technology Park East Lake New Technology Development Zone, Road No. five Patentee after: SINOPEC OILFIELD EQUIPMENT CORPORATION Address before: 430223 Hubei city of Wuhan province science and Technology Park East Lake New Technology Development Zone, Road No. five Patentee before: Jianghan Petroleum Drilling Bit Co., Ltd. |
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TR01 | Transfer of patent right |
Effective date of registration: 20180315 Address after: 430223, No. 5, Chinese workers' garden, Temple Hill community, East Lake New Technology Development Zone, Wuhan, Hubei Co-patentee after: SINOPEC OILFIELD EQUIPMENT CORPORATION Patentee after: Kingdream Sinopec Petroleum Machinery Co. Ltd. Address before: 430223 Hubei city of Wuhan province science and Technology Park East Lake New Technology Development Zone, Road No. five Patentee before: SINOPEC OILFIELD EQUIPMENT CORPORATION |
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TR01 | Transfer of patent right |