Kyu Dong Choi

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Changwon, KR

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Patents Grantslast 30 patents

Information Patent Grant
Suspension for high power micro speaker and high power micro speake...
- Patent number 9,900,703
- Issue date Feb 20, 2018
- Em-Tech. Co., Ltd.
- Cheon Myeong Kim
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Suspension for high power micro speaker and high power micro speake...
- Patent number 9,693,145
- Issue date Jun 27, 2017
- Em-Tech. Co., Ltd.
- Cheon Myeong Kim
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Sound transducer with ventilation structure
- Patent number 9,473,837
- Issue date Oct 18, 2016
- Em-Tech. Co., Ltd.
- Kyu Dong Choi
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Suspension for a sound transducer
- Patent number 9,277,305
- Issue date Mar 1, 2016
- Em-Tech. Co., Ltd.
- Joong Hak Kwon
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Inner magnet type microspeaker
- Patent number 9,185,494
- Issue date Nov 10, 2015
- Em-Tech. Co., Ltd.
- Kyu Dong Choi
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Vibration module for sound transducer
- Patent number 9,088,840
- Issue date Jul 21, 2015
- Em-Tech. Co., Ltd.
- Kyu Dong Choi
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
High-output microspeaker
- Patent number 9,025,808
- Issue date May 5, 2015
- Em-Tech. Co., Ltd.
- Joong Hak Kwon
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents

Information Patent Application
Inner Ring Magnet Type Microspeaker
- Publication number 20140241566
- Publication date Aug 28, 2014
- Em-Tech Co., Ltd.
- Kyu Dong Choi
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
HIGH-OUTPUT MICROSPEAKER
- Publication number 20140169593
- Publication date Jun 19, 2014
- Em-Tech Co., Ltd.
- Joong Hak Kwon
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
VIBRATION MODULE FOR SOUND TRANSDUCER
- Publication number 20140119578
- Publication date May 1, 2014
- Em-Tech Co., Ltd.
- Kyu Dong Choi
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
SOUND TRANSDUCER WITH VENTILATION STRUCTURE
- Publication number 20140119592
- Publication date May 1, 2014
- Em-Tech Co., Ltd.
- Kyu Dong Choi
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
SUSPENSION FOR HIGH POWER MICRO SPEAKER AND HIGH POWER MICRO SPEAKE...
- Publication number 20140056463
- Publication date Feb 27, 2014
- Em-Tech Co., Ltd.
- Cheon Myeong Kim
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
SUSPENSION FOR A SOUND TRANSDUCER
- Publication number 20140029784
- Publication date Jan 30, 2014
- Em-Tech Co., Ltd.
- Joong Hak Kwon
- H04 - ELECTRIC COMMUNICATION TECHNIQUE