Invention Patents

Total 45 Patents of invention and 24 Registrations of Design, 5 Utility models

Improved frost proof yard hydrant

Wall Sleeve for construction

Height Adjustable piping sleeve

Water meter box body

Improved manhole for construction

Manhole cutting off bad smell

Warming stopper of water meter box

Floor drain

Devices for preventing smell for drainage manholes

Height control structure of manhole

Sealing structure of insulation materials put in water meter boxes

Frost proof yard hydrant with replacement function