First-generation “Automatic Turning Device” (utility model) patent
Second-generation “Automatic Turning Device” (utility model) patent
Third-generation “Elastic Torque-Driven Turning Device” (invention) patent
Axial-flow propeller-type unit drive device and axial-flow propeller-type machine
Fourth-generation “Steering Wheel Vehicle Device” (invention) patent
A rotary drive device for bulb-type tubular turbine units
Fourth-generation “Steering Wheel Carrying Device” (utility model) patent
Fifth-generation patent for “A Directional Drive Device” (invention)
High-efficiency water-lifting device
Trademark Registration Certificate
Environmental Management System Certification Certificate
Occupational Health and Safety Management System Certification Certificate
Quality Management System Certification Certificate
A clearance-lubricated shaft seal device and a rotary pump
Canadian Patent Certificate No. 2500 079
European Community Patent No. 1550792
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