Patents by Inventor Ho Yan Ho

Ho Yan Ho 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).

  • Electromagnetic interference filter
    Patent number: 8098495
    Abstract: A differential mode and common mode combination choke (DCCC) includes: a theta-shaped magnetic core including an essentially round magnetic ring and a magnetic plate engaged with magnetic ring across the area surrounded by the magnetic ring; and two common mode coils with the same number of turns and the same winding direction being wound around the magnetic ring. An EMI (electromagnetic interference) filter and an EMI filter module including the DCCC are also provided.
    Type: Grant
    Filed: January 31, 2011
    Date of Patent: January 17, 2012
    Assignee: EMIF Technology Limited
    Inventor: Ho Yan Ho
  • ELECTROMAGNETIC INTERFERENCE FILTER
    Publication number: 20110199751
    Abstract: A differential mode and common mode combination choke (DCCC) includes: a theta-shaped magnetic core including an essentially round magnetic ring and a magnetic plate engaged with magnetic ring across the area surrounded by the magnetic ring; and two common mode coils with the same number of turns and the same winding direction being wound around the magnetic ring. An EMI (electromagnetic interference) filter and an EMI filter module including the DCCC are also provided.
    Type: Application
    Filed: January 31, 2011
    Publication date: August 18, 2011
    Inventor: Ho Yan HO