Patents by Inventor Atsushi MURAMATU

Atsushi MURAMATU 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).

  • Method of producing magnetic powder and method of producing magnetic recording medium
    Patent number: 11830533
    Abstract: [Solving Means] A method of producing a magnetic powder includes: coating a surface of each of silica-coated precursor particles with at least one type of coating agent of a metal chloride or a sulfate; and firing the precursor particles coated with the coating agent.
    Type: Grant
    Filed: March 27, 2019
    Date of Patent: November 28, 2023
    Assignee: Sony Corporation
    Inventors: Natsuki Toyosawa, Norikatsu Fujisawa, Yuta Akimoto, Satoru Abe, Masaru Terakawa, Katsunori Maeshima, Atsushi Muramatu, Masafumi Nakaya
  • METHOD OF PRODUCING MAGNETIC POWDER AND METHOD OF PRODUCING MAGNETIC RECORDING MEDIUM
    Publication number: 20210027807
    Abstract: [Solving Means] A method of producing a magnetic powder includes: coating a surface of each of silica-coated precursor particles with at least one type of coating agent of a metal chloride or a sulfate; and firing the precursor particles coated with the coating agent.
    Type: Application
    Filed: March 27, 2019
    Publication date: January 28, 2021
    Inventors: Natsuki TOYOSAWA, Norikatsu FUJISAWA, Yuta AKIMOTO, Satoru ABE, Masaru TERAKAWA, Katsunori MAESHIMA, Atsushi MURAMATU, Masashi NAKATANI