Patents by Inventor Chak Tang

Chak Tang 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).

  • Electronic circuit board
    Publication number: 20050263321
    Abstract: A circuit board, for an electronic circuit having a passive circuit component, has a component region, non-component region, and circuit wiring conductors on its surface. The component region includes a polymer composition comprising a mixture of polymer resin and filler material that, in combination with the circuit wiring conductors, forms the passive circuit component.
    Type: Application
    Filed: June 9, 2005
    Publication date: December 1, 2005
    Applicant: The Hong Kong Polytechnic University
    Inventors: Ka Cheng, Chak Tang
  • Core and composition having magnetic properties
    Publication number: 20050151123
    Abstract: A magnetic core is made of a composite magnetic material having a relative permeability of between 1 and 29 at a frequency range from 20 kHz to 2.5 MHz. The composite magnetic material consists of cobalt and nickel particles having an average diameter in the range of 1 to 100 micrometers, and a polymer base binding the particles to form a core.
    Type: Application
    Filed: October 27, 2004
    Publication date: July 14, 2005
    Applicant: The Hong Kong Polytechnic University
    Inventors: Ka Cheng, Chak Tang, David Cheng, Hang Wu