Patents by Inventor Tomokazu Katsuragawa

Tomokazu Katsuragawa 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).

  • Portable device for generating and tuning a whole tone scale
    Patent number: 3948140
    Abstract: A portable device for generating and tuning a whole tone scale comprising means for generating a signal having a frequency of a reference tone scale, first means for shaping an output of the signal generating means and means for converting the output of the first shaping means. The device further includes means for converting the audible tone of a musical instrument to be tuned into a train of electrical signals, means for frequency multiplying and dividing input signals, second means for shaping the output of the converting means, logic means for logically comparing the outputs of the first and the second shaping means to generate a train of signals each having a width corresponding to the frequency difference between the outputs of the first and the second shaping means, and means for indicating the output of the logic means.
    Type: Grant
    Filed: August 28, 1974
    Date of Patent: April 6, 1976
    Assignee: Mishima Kosan Co., Ltd.
    Inventors: Satoshi Ichioka, Shinjiro Takeuchi, Tadashi Inoue, Tomokazu Katsuragawa