Patents by Inventor Goiti Yamakawa

Goiti Yamakawa 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).

  • Toner for developing electrostatic latent images
    Patent number: 4021358
    Abstract: A toner for developing electrostatic images which contains a particular addition condensate and a colorant wherein said addition condensate is present in an amount of from 1 to 100 parts by weight and said colorant in an amount of from 1 to 10 parts by weight of said toner.
    Type: Grant
    Filed: July 3, 1975
    Date of Patent: May 3, 1977
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Makoto Tomono, Goiti Yamakawa, Akira Inoue, Masahiro Otsuka