Hengli Cong

Follow

Person

Shandong, CN

People

Patents Grantslast 30 patents

Information Patent Grant
Surface motor direct-drive sucker-rod screw pump device
- Patent number 9,059,606
- Issue date Jun 16, 2015
- Millennium Oiflow Systems & Technology Inc.
- Jun Liu
- F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
Information Patent Grant
Surface motor direct-drive sucker-rod screw pump device
- Patent number 8,702,400
- Issue date Apr 22, 2014
- Millennium Oilflow systems & Technology Inc.
- Jun Liu
- F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
Information Patent Grant
Braking controller of a three-phase permanent magnetic brushless DC...
- Patent number 8,283,879
- Issue date Oct 9, 2012
- Millennium Oilflow systems & Technology Inc.
- Jun Liu
- F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...

Patents Applicationslast 30 patents

Information Patent Application
SURFACE MOTOR DIRECT-DRIVE SUCKER-ROD SCREW PUMP DEVICE
- Publication number 20140197767
- Publication date Jul 17, 2014
- Millennium Oilflow Systems & Technology Inc.
- Jun Liu
- F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
Information Patent Application
Braking Controller of a Three-Phase Permanent Magnetic Brushless DC...
- Publication number 20100166572
- Publication date Jul 1, 2010
- Jun Liu
- F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...