Patents by Inventor Tadahiko Matumoto

Tadahiko Matumoto 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).

  • Composite transformer and insulated switching power source device
    Patent number: 7872561
    Abstract: An E-shaped transformer core has a middle leg and one pair of outer legs and on opposite sides with respect to the middle leg. A first pair of coils including at least two coils are wound around the middle leg so that a power transmission transformer unit is formed. The outer leg is divided into two outer leg portions and with a space therebetween allowing coil wiring therebetween, and a second pair of coils including two coils are respectively wound around the respective two outer leg portions and so as to have mutually opposite winding directions, so that a signal transmission transformer unit is formed.
    Type: Grant
    Filed: June 12, 2008
    Date of Patent: January 18, 2011
    Assignee: Murata Manufacturing Co., Ltd.
    Inventor: Tadahiko Matumoto
  • COMPOSITE TRANSFORMER AND INSULATED SWITCHING POWER SOURCE DEVICE
    Publication number: 20080253149
    Abstract: An E-shaped transformer core has a middle leg and one pair of outer legs and on opposite sides with respect to the middle leg. A first pair of coils including at least two coils are wound around the middle leg so that a power transmission transformer unit is formed. The outer leg is divided into two outer leg portions and with a space therebetween allowing coil wiring therebetween, and a second pair of coils including two coils are respectively wound around the respective two outer leg portions and so as to have mutually opposite winding directions, so that a signal transmission transformer unit is formed.
    Type: Application
    Filed: June 12, 2008
    Publication date: October 16, 2008
    Inventor: Tadahiko Matumoto