Patents by Inventor Kenji Wakana

Kenji Wakana 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).

  • Buzzer-driving apparatus
    Patent number: 6809634
    Abstract: A pulse signal, having a buzzer-driving frequency, for driving a buzzer (3) is generated by a free running timer of a timer management section of a microcomputer (1). The timer management section operates independently of software processing of the microcomputer (1). A transistor (2) is turned on and off by the pulse signal having the buzzer-driving frequency. Accordingly, electricity flows through the buzzer (3). The buzzer (3) in turn, generates a sound.
    Type: Grant
    Filed: April 24, 2002
    Date of Patent: October 26, 2004
    Assignee: Sumitomo Wiring Systems, Ltd
    Inventors: Hideaki Uemura, Kenji Wakana
  • Buzzer-driving apparatus
    Publication number: 20020180593
    Abstract: A pulse signal, having a buzzer-driving frequency, for driving a buzzer (3) is generated by a free running timer of a timer management section of a microcomputer (1). The timer management section operates independently of software processing of the microcomputer (1). A transistor (2) is turned on and off by the pulse signal having the buzzer-driving frequency. Accordingly, electricity flows through the buzzer (3). The buzzer (3) in turn, generates a sound.
    Type: Application
    Filed: April 24, 2002
    Publication date: December 5, 2002
    Inventors: Hideaki Uemura, Kenji Wakana