Patents by Inventor Yuzuru YAMASAKI

Yuzuru YAMASAKI 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).

  • Ferrite carrier core material for electrophotographic developer, carrier for electrophotographic developer, and developer
    Patent number: 11150569
    Abstract: Provided are a ferrite carrier core material for an electrophotographic developer having a full length L1 of grain boundary and a circumference length L2 of the core material in a cross-section of the core material, and satisfying a relationship of 2?L1/L2?9; a carrier for an electrophotographic developer including the ferrite carrier core material and a coating layer containing a resin provided on a surface of the ferrite carrier core material; and an electrophotographic developer including the carrier and a toner.
    Type: Grant
    Filed: November 26, 2018
    Date of Patent: October 19, 2021
    Assignee: POWDERTECH CO., LTD.
    Inventors: Yuzuru Yamasaki, Takao Sugiura, Takeshi Naito, Tetsuya Uemura
  • FERRITE CARRIER CORE MATERIAL FOR ELECTROPHOTOGRAPHIC DEVELOPER, CARRIER FOR ELECTROPHOTOGRAPHIC DEVELOPER, AND DEVELOPER
    Publication number: 20190163081
    Abstract: Provided are a ferrite carrier core material for an electrophotographic developer having a full length L1 of grain boundary and a circumference length L2 of the core material in a cross-section of the core material, and satisfying a relationship of 2?L1/L2?9; a carrier for an electrophotographic developer including the ferrite carrier core material and a coating layer containing a resin provided on a surface of the ferrite carrier core material; and an electrophotographic developer including the carrier and a toner.
    Type: Application
    Filed: November 26, 2018
    Publication date: May 30, 2019
    Inventors: Yuzuru YAMASAKI, Takao SUGIURA, Takeshi NAITO, Tetsuya UEMURA