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Letters Patent

A multi-layer door and window sealing structure based on glass magnesium plate - utility model patent certificate

A multi-layer door and window sealing structure based on glass magnesium plate - utility model patent certificate

A new reinforced fireproof hinge structure - utility model patent certificate

A new reinforced fireproof hinge structure - utility model patent certificate

A new type of reinforced fireproof invisible hinge structure - utility model patent certificate

A new type of reinforced fireproof invisible hinge structure - utility model patent certificate

A bilateral plate fastener with a tenon installation part - utility model patent certificate

A bilateral plate fastener with a tenon installation part - utility model patent certificate

A plate installation component of a fixed fireproof rock wool strip - utility model patent certificate

A plate installation component of a fixed fireproof rock wool strip - utility model patent certificate

A kind of openable fireproof window - utility model patent certificate

A kind of openable fireproof window - utility model patent certificate

A sealed fireproof door structure - utility model patent certificate

A sealed fireproof door structure - utility model patent certificate

A Hamming silicon composite heat insulating fireproof glass with special groove for curtain wall - utility model patent certificate

A Hamming silicon composite heat insulating fireproof glass with special groove for curtain wall - utility model patent certificate

A plate frame component suitable for wall fixing - utility model patent certificate

A plate frame component suitable for wall fixing - utility model patent certificate

A new type of fire and smoke proof glass door with ground spring structure - utility model patent certificate

A new type of fire and smoke proof glass door with ground spring structure - utility model patent certificate

A new type of super large crystal silicon fireproof glass door with eccentric rocker arm structure - utility model patent certificate

A new type of super large crystal silicon fireproof glass door with eccentric rocker arm structure - utility model patent certificate

A centrosymmetric intermediate connector - utility model patent certificate

A centrosymmetric intermediate connector - utility model patent certificate