CN206640773U - 一种用于音频教学系统的智能调频控制器 - Google Patents
一种用于音频教学系统的智能调频控制器 Download PDFInfo
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Denomination of utility model: A intelligent frequency modulation controller for audio frequency teaching system Effective date of registration: 20200317 Granted publication date: 20171114 Pledgee: Guangzhou Bank Co., Ltd. Guangzhou Fangcun Branch Pledgor: GUANGZHOU JUSBE ELECTRONIC TECHNOLOGY Co.,Ltd. Registration number: Y2020440000036 |
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Date of cancellation: 20210401 Granted publication date: 20171114 Pledgee: Guangzhou Bank Co.,Ltd. Guangzhou Fangcun Branch Pledgor: GUANGZHOU JUSBE ELECTRONIC TECHNOLOGY Co.,Ltd. Registration number: Y2020440000036 |