Patent of invention for A method of melting & casting of aluminum alloy for high strength positioner arm on high speed railway. It perfectly find a way to get a high strength alloy to make aluminum positioner for China railways with 350km/h or higher speed.

Patent of invention for A method of surface treatment on aluminum profiles. Common anodizing can not allow the aluminum tubes to bear the erosion of salt and acid from the air for over 25years. Our invention of anodizing method can solve this issue. It is to protect the supports to power supply cables on railway lines adjacent to seacoast from eroding for designed life cycle.

Patent of invention for A method of producing special aluminum alloy and application of this alloy for new generation power supply system of Metro systems. The new system of power supply can improve the speed of metro train to 100km to 120km/hour.

Utility Model Patent for A cable hook with a ground wire clamp. It is for electric railways in China and very useful.

Utility model patent for A connecting plate with a new type of thread sleeve.

Utility model patent for A new type of aluminum tube for electric railway lines in China.

Appearance patent for Cable hanger special for electric railways in China.