Patents by Inventor Yoshihiko Kiyono

Yoshihiko Kiyono 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 analog timepiece with voltage checking function
    Patent number: 4759003
    Abstract: An electronic analog timepiece with voltage checking function, which detects the power source condition, and which informs the user of the necessity of charging operation by changing the magnitude of the power source voltage into the distance by which the hand is carried or the amount by which the hand is moved upon operation from external side.The hand is stopped from moving for a predetermined period of time in the first time only in which the voltage checking operation is carried out.
    Type: Grant
    Filed: February 17, 1987
    Date of Patent: July 19, 1988
    Assignee: Seiko Instruments Inc.
    Inventors: Yoshihiko Kiyono, Syuji Ohtawa, Hitoshi Ochiai, Hiroshi Odagiri, Yuichi Inoue
  • Circuit for charging capacitors
    Patent number: 4750099
    Abstract: A circuit for charging capacitors having a power source, a plurality of capacitors for accumulating an electric charge from the power source, switching elements with electrically controllable inputs for connecting or disconnecting at least one of the capacitors to or from the power source, and resistors for setting the switching elements to turn off. These resistors are connected to the control inputs of the switching elements and to one of two terminals of the power source directly so that the resistors consume the electric charge only when the power source supplies the electric charge.
    Type: Grant
    Filed: February 25, 1987
    Date of Patent: June 7, 1988
    Assignee: Seiko Instruments Inc.
    Inventors: Yuichi Inoue, Shuji Ohtawa, Hitoshi Ochiai, Yoshihiko Kiyono, Chiaki Nakamura
  • Electronic analogue timepiece of DC magnetic field detection type
    Patent number: 4688948
    Abstract: In an electronic analogue timepiece driven by a stepping motor, DC magnetic field detector is connected to the stepping motor to detect the presence of an external DC magnetic field by comparing two induced voltages induced across a motor coil due to free rotation of a motor rotor after each application of two successive drive pulses to the motor coil. A controller is connected to the DC magnetic field detector to control the stepping motor to effect compensation for the detected DC magnetic field.
    Type: Grant
    Filed: September 4, 1986
    Date of Patent: August 25, 1987
    Assignee: Seiko Instruments & Electronics Ltd.
    Inventor: Yoshihiko Kiyono