About 1 Trademarks found that are owned by Dongguan Yihuan Information Technology Co Ltd

Air analysis apparatus; Charging appliances for rechargeable equipment; Electric door bells; Electronic-based instruments for measuring environmental parameters including humidity, mold, bacteria, air quality and water quality; Gas testing instruments; Power supply connectors and adaptors for use with portable electronic devices; Surveying instruments; Thermo-hygrometers; Thermometers, not for medical purposes; Tool measuring instruments