Patents by Inventor Seoung Choi

Seoung 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).

  • Resonance-type power switching device
    Patent number: 5923543
    Abstract: A resonance-type power switching device includes: a power controller for producing a power control pulse, main and auxiliary switches for generating switching power in response to the power control pulse, and a control pulse advancing circuit for advancing the generation of the power control pulse by a preset time interval and for supplying the advanced generation of the power control pulse to the auxiliary switch in advance, such that a drive signal is generated to provide an off time interval between the turn-on of the main switch and the turn-on of the auxiliary switch to effect resonance during the off time interval.
    Type: Grant
    Filed: December 11, 1997
    Date of Patent: July 13, 1999
    Assignee: SamSung Electronics Co., Ltd.
    Inventor: Seoung Choi
  • Electric toothbrush
    Patent number: D802935
    Type: Grant
    Filed: March 9, 2016
    Date of Patent: November 21, 2017
    Inventors: Hyeong Moon Park, Jae Seoung Choi
  • Charger for electric toothbrush
    Patent number: D803153
    Type: Grant
    Filed: March 9, 2016
    Date of Patent: November 21, 2017
    Inventors: Hyeong Moon Park, Jae Seoung Choi
  • Brush head for electric toothbrush
    Patent number: D807645
    Type: Grant
    Filed: March 14, 2016
    Date of Patent: January 16, 2018
    Inventors: Hyeong Moon Park, Jae Seoung Choi