Changfeng Liu

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Chongqing, CN

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Patents Grantslast 30 patents

Information Patent Grant
Lateral grinding drill with continuously variable angle and driving...
- Patent number 10,178,998
- Issue date Jan 15, 2019
- Chongqing Xishan Science & Technology Co., Ltd.
- Yijun Guo
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
Information Patent Grant
Handheld power machine for orthopaedic drill and saw and orthopaedi...
- Patent number 9,924,954
- Issue date Mar 27, 2018
- Chongqing Xishan Science & Technology Co., Ltd.
- Yijun Guo
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE

Patents Applicationslast 30 patents

Information Patent Application
LATERAL GRINDING DRILL WITH CONTINUOUSLY VARIABLE ANGLE AND DRIVING...
- Publication number 20160106442
- Publication date Apr 21, 2016
- Chongqing Xishan Science & Technology Co., Ltd.
- Yijun Guo
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
Information Patent Application
HANDHELD POWER MACHINE FOR ORTHOPAEDIC DRILL AND SAW AND ORTHOPAEDI...
- Publication number 20150245846
- Publication date Sep 3, 2015
- CHONGOING XISHAN SCIENCE & TECHNOLOGY CO., LTD.
- Yijun Guo
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE