Patents by Inventor Teruo Namba

Teruo Namba 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).

  • Touch sensor
    Patent number: 5465091
    Abstract: A touch sensor has an LC oscillator circuit 1, 2, 3, and 4, a rectification circuit 10 which rectifies outputs of the oscillator circuit 1, 2, 3, and 4, a voltage detection circuit 12, 13, 14, and 15 which detects the rectified voltage, and a sensor plate 8 connected to the input section of the rectification circuit, and detecting contact of a finger with the sensor plate 8 by enabling the voltage detection circuit 12, 13, 14, and 15 to detects a drop of equivalent impedance due to a finger touching the sensor plate 8 as a change of voltage.
    Type: Grant
    Filed: February 16, 1994
    Date of Patent: November 7, 1995
    Assignees: Showa Shell Sekiyu K.K., Matsushita Electric Industrial Co., Ltd.
    Inventors: Atsushi Nishino, Akihiko Yoshida, Teruo Namba, Masaaki Aoki, Atsushi Naito