Patents by Inventor You Lim Choi

You Lim Choi has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Canal-type earphone having pressure equilibrium structure
    Patent number: 11381898
    Abstract: Disclosed is a canal-type earphone having a pressure equilibrium structure. The canal-type earphone includes: a microspeaker including a frame, a magnetic circuit, a voice coil, and a diaphragm; an earphone housing including an accommodation space accommodating the microspeaker and a nozzle extending to one side of the accommodation space; a vent hole formed at the earphone housing, installed in at least one of portions located in front of the microspeaker in the nozzle and the accommodation space, and allowing air to flow outside and inside the earphone housing; and an eartip coupled to outside of the nozzle of the earphone housing.
    Type: Grant
    Filed: February 16, 2021
    Date of Patent: July 5, 2022
    Assignee: EM-TECH CO., LTD.
    Inventors: Cheon Kyu Choi, You Lim Choi
  • Canal-Type Earphone having Pressure Equilibrium Structure
    Publication number: 20210258677
    Abstract: Disclosed is a canal-type earphone having a pressure equilibrium structure. The canal-type earphone includes: a microspeaker including a frame, a magnetic circuit, a voice coil, and a diaphragm; an earphone housing including an accommodation space accommodating the microspeaker and a nozzle extending to one side of the accommodation space; a vent hole formed at the earphone housing, installed in at least one of portions located in front of the microspeaker in the nozzle and the accommodation space, and allowing air to flow outside and inside the earphone housing; and an eartip coupled to outside of the nozzle of the earphone housing.
    Type: Application
    Filed: February 16, 2021
    Publication date: August 19, 2021
    Inventors: Cheon Kyu Choi, You Lim Choi