About Beijing Changba Technology Co Ltd
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CALF by Beijing Changba Technology Co., Ltd. (Track this)
Intl: (009) Electrical and scientific apparatus US: 021; 023; 026; 036; 038 Filing date: 28-Jul-2023 Serial number: 98106090
CALF by Beijing Changba Technology Co., Ltd. (Track this)
Intl: (009) Electrical and scientific apparatus; (041) Education and entertainment US: 021; 023; 026; 036; 038; 100; 101; 107 Filing date: 25-Mar-2022 Serial number: 97331085
CALF by Beijing Changba Technology Co., Ltd. (Track this)
Intl: (009) Electrical and scientific apparatus US: 021; 023; 026; 036; 038 Filing date: 15-Sep-2020 Serial number: 90181525
OPENMIC by Beijing Changba Technology Co., Ltd. (Track this)
Intl: (009) Electrical and scientific apparatus US: 021; 023; 026; 036; 038 Filing date: 15-Sep-2020 Serial number: 90181628