Patents by Inventor Kwok Tse

Kwok Tse 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).

  • Drive circuit for a hair clipper
    Publication number: 20060207103
    Abstract: A drive circuit for a hair clipper comprises an electric motor and a control circuit for operating the motor at a constant speed regardless of load conditions. The control circuit has detector means for sensing the supply voltage to the clipper and the clipper current, processor means for generating an error signal indicative of a change in supply voltage needed to maintain a constant motor speed and driver means responsive to the error signal for adjusting the supply voltage to the motor to maintain the speed constant.
    Type: Application
    Filed: March 16, 2006
    Publication date: September 21, 2006
    Inventors: Kwok Tse, En Wang