Patents by Inventor Kao-Chun Chang

Kao-Chun Chang 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).

  • USB power adapter for AC and DC power
    Patent number: 9112315
    Abstract: A USB power adapter for AC and DC power has a circuit board, a base and a top cover. The base and the top cover receive the circuit board therein. The circuit board has an AC conversion module, a DC conversion module, and a USB connection port. The base has a cigarette lighter electrically connected to the DC conversion module. The top cover has a pair of blades electrically connected to the AC conversion module. The AC power inputted through the pair of blades is converted by the AC conversion and the DC conversion module into the power outputted through the USB connection port. Accordingly, it is unnecessary to prepare a dedicated AC or DC charger depending upon the type of power source or to prepare a charger requiring many replaceable plugs. The inconvenience caused by carrying and operating those chargers or plugs can be resolved.
    Type: Grant
    Filed: February 1, 2013
    Date of Patent: August 18, 2015
    Assignee: Quietek Corporation
    Inventor: Kao-Chun Chang
  • USB POWER ADAPTER FOR AC AND DC POWER
    Publication number: 20140218974
    Abstract: A USB power adapter for AC and DC power has a circuit board, a base and a top cover. The base and the top cover receive the circuit board therein. The circuit board has an AC conversion module, a DC conversion module, and a USB connection port. The base has a cigarette lighter electrically connected to the DC conversion module. The top cover has a pair of blades electrically connected to the AC conversion module. The AC power inputted through the pair of blades is converted by the AC conversion and the DC conversion module into the power outputted through the USB connection port. Accordingly, it is unnecessary to prepare a dedicated AC or DC charger depending upon the type of power source or to prepare a charger requiring many replaceable plugs. The inconvenience caused by carrying and operating those chargers or plugs can be resolved.
    Type: Application
    Filed: February 1, 2013
    Publication date: August 7, 2014
    Applicant: QUIETEK CORPORATION
    Inventor: Kao-Chun Chang