Beijing Hinen-Hitech Petroleum Technology Development Co., Ltd

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Patents Grantslast 30 patents

Information Patent Grant
Screen manufacturing method and welding apparatus thereof
- Patent number 7,716,834
- Issue date May 18, 2010
- Beijing Hinen-Hitech Petroleum Technology Development Co., Ltd
- Chunhong Huang
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR

Patents Applicationslast 30 patents

Information Patent Application
SCREEN MANUFACTURING METHOD AND WELDING APPARATUS THEREOF
- Publication number 20090250438
- Publication date Oct 8, 2009
- BEIJING HINEN-HITECH PETROLEUM TECHNOLOGY DEVELOPMENT CO., LTD.
- Chunhong Huang
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Information Patent Application
Screen manufacturing method and welding apparatus thereof
- Publication number 20070204465
- Publication date Sep 6, 2007
- BEIJING HINEN-HITECH PETROLEUM TECHNOLOGY DEVELOPMENT CO., LTD.
- Chunhong Huang
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR

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