Patents by Inventor Eiji Ishikura

Eiji Ishikura 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).

  • Tape reel rotation detecting apparatus
    Patent number: 5019924
    Abstract: A tape reel rotation detecting device is configured to detect abnormal rotations of a reel by comparing the length of a pulse generated in response to rotations of the reel and a pulse length set to correspond to abnormal rotations of the reel.
    Type: Grant
    Filed: August 22, 1989
    Date of Patent: May 28, 1991
    Assignee: Clarion Co., Ltd.
    Inventors: Kazuki Takai, Eiji Ishikura
  • Tape twine detecting device
    Patent number: 4993659
    Abstract: A tape twine detecting device is disclosed, in which the rotation direction of a reel base is detected on the basis of signals having waveforms of at least three different widths generated by the rotation of the reel base and a tape twine occurrence indicating signal is sent, when it is judged that the rotation is reverse.
    Type: Grant
    Filed: May 16, 1989
    Date of Patent: February 19, 1991
    Assignee: Clarion Co., Ltd.
    Inventors: Kazuki Takai, Eiji Ishikura