CN208572380U - 一种便于携带的英语口语练习用耳机 - Google Patents
一种便于携带的英语口语练习用耳机 Download PDFInfo
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- CN208572380U CN208572380U CN201821547165.0U CN201821547165U CN208572380U CN 208572380 U CN208572380 U CN 208572380U CN 201821547165 U CN201821547165 U CN 201821547165U CN 208572380 U CN208572380 U CN 208572380U
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CN201821547165.0U CN208572380U (zh) | 2018-09-21 | 2018-09-21 | 一种便于携带的英语口语练习用耳机 |
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GR01 | Patent grant | ||
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Effective date of registration: 20200923 Address after: 730300 Gansu Vocational College of Energy and Chemical Industry, Lanzhou New District Vocational Education Park, Gansu Province Patentee after: GANSU VOCATIONAL College OF ENERGY AND CHEMICAL INDUSTRY Address before: 730300 Gansu Vocational College of Energy and Chemical Industry, Lanzhou New District Vocational Education Park, Gansu Province Patentee before: Jia Fei |
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CF01 | Termination of patent right due to non-payment of annual fee | ||
CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190301 Termination date: 20210921 |