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Patents Grantslast 30 patents

Information Patent Grant
Micro speaker with amplitude stability
- Patent number 11,438,699
- Issue date Sep 6, 2022
- DRAGONSTATE TECHNOLOGY CO., LTD.
- Si-Si He
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Micro speaker unit with a waterproof effect
- Patent number 11,277,693
- Issue date Mar 15, 2022
- Concraft Holding Co., Ltd.
- Si-Si He
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents

Information Patent Application
MICRO SPEAKER WITH AMPLITUDE STABILITY
- Publication number 20220167091
- Publication date May 26, 2022
- CONCRAFT HOLDING CO., LTD.
- Si-Si HE
- H04 - ELECTRIC COMMUNICATION TECHNIQUE