Patents by Inventor Kai Dou

Kai Dou 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).

  • Driving circuit for providing constant current
    Patent number: 7714812
    Abstract: A driving circuit comprising a reference-voltage circuit, an amplifier, an adjusting circuit, and a current-setting circuit. The reference-voltage circuit is used for generating a reference voltage. The amplifier comprises a first input terminal used for receiving the reference voltage, a second input terminal used for receiving feedback voltage from a load, and an output terminal used for outputting an output current to the load. The adjusting circuit is used for adjusting a voltage of the load when a resistance of the load changes. The current-setting circuit is used for setting a value of the output current based on the feedback voltage.
    Type: Grant
    Filed: November 28, 2006
    Date of Patent: May 11, 2010
    Assignees: Hong Fu Jin Precision Industry (Shen Zhen) Co., Ltd., Hon Hai Precision Industry Co., Ltd.
    Inventors: Kai Dou, Zhang-Xiang Hu, Cho-Chuan Yang, Zhao-Cai Zhang, Jian-De Qing
  • DRIVING CIRCUIT FOR PROVIDING CONSTANT CURRENT
    Publication number: 20080122385
    Abstract: A driving circuit comprising a reference-voltage circuit, an amplifier, an adjusting circuit, and a current-setting circuit. The reference-voltage circuit is used for generating a reference voltage. The amplifier comprises a first input terminal used for receiving the reference voltage, a second input terminal used for receiving feedback voltage from a load, and an output terminal used for outputting an output current to the load. The adjusting circuit is used for adjusting a voltage of the load when a resistance of the load changes. The current-setting circuit is used for setting a value of the output current based on the feedback voltage.
    Type: Application
    Filed: November 28, 2006
    Publication date: May 29, 2008
    Applicant: HON HAI PRECISION INDUSTRY CO., LTD.
    Inventors: Kai Dou, Zhang-Xiang Hu, Cho-Chuan Yang, Zhao-Cai Zhang, Jian-De Qing
  • Mini personal computer
    Patent number: D821386
    Type: Grant
    Filed: May 4, 2017
    Date of Patent: June 26, 2018
    Inventor: Kai Dou
  • Hair removal device
    Patent number: D1013270
    Type: Grant
    Filed: July 11, 2023
    Date of Patent: January 30, 2024
    Inventor: Kai Dou
  • Hair removal device
    Patent number: D1018983
    Type: Grant
    Filed: July 12, 2023
    Date of Patent: March 19, 2024
    Inventor: Kai Dou
  • Depilatory device
    Patent number: D1050602
    Type: Grant
    Filed: June 25, 2024
    Date of Patent: November 5, 2024
    Assignee: Shenzhen Chuangtongyigou Technology Co., Ltd.
    Inventor: Kai Dou
  • Laser hair removal device
    Patent number: D1091944
    Type: Grant
    Filed: August 13, 2024
    Date of Patent: September 2, 2025
    Assignee: Shenzhen Chuangtong Yigou Technology Co., Ltd.
    Inventor: Kai Dou
  • Laser hair removal device
    Patent number: D1093731
    Type: Grant
    Filed: August 13, 2024
    Date of Patent: September 16, 2025
    Assignee: Shenzhen Chuangtong Yigou Technology Co., Ltd.
    Inventor: Kai Dou
  • Depilatory device
    Patent number: D1119080
    Type: Grant
    Filed: December 22, 2024
    Date of Patent: March 17, 2026
    Inventor: Kai Dou
  • Hair removal device
    Patent number: D1120484
    Type: Grant
    Filed: December 11, 2024
    Date of Patent: March 24, 2026
    Assignee: Shenzhen Chuangtong Yigou Technology Co., Ltd.
    Inventor: Kai Dou
  • Depilatory device
    Patent number: D1122519
    Type: Grant
    Filed: January 2, 2025
    Date of Patent: April 14, 2026
    Inventor: Kai Dou