Patents by Inventor Yoshimichi Sakama

Yoshimichi Sakama 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).

  • Polyamide plastic magnetic material and magnet made of same
    Patent number: 6680000
    Abstract: A polyamide plastic magnetic material excellent in fluidity is provided, and a plastic magnet made of the same is highly flexible with no deterioration in strength and does not crack during fabrication. The polyamide plastic magnetic material consists of: magnetic powder; polyamide resin; and a predetermined amount of bis unsaturated fatty acid amide represented by the formula: R1—CONH—R3—NHCO—R2 where R1 and R2 is an unsaturated hydrocarbon group having at least one double bond and R3 is a hydrocarbon group. The three components are kneaded into a final magnetic material.
    Type: Grant
    Filed: July 10, 2002
    Date of Patent: January 20, 2004
    Assignee: Minebea Co., Ltd.
    Inventors: Takahiro Sasazawa, Yoshimichi Sakama
  • Polyamide plastic magnetic material and magnet made of same
    Publication number: 20030034476
    Abstract: A polyamide plastic magnetic material excellent in fluidity is provided, and a plastic magnet made of the same is highly flexible with no deterioration in strength and does not crack during fabrication. The polyamide plastic magnetic material consists of: magnetic powder; polyamide resin; and a predetermined amount of bis unsaturated fatty acid amide represented by the formula: R1—CONH—R3—NHCO—R2 where R1 and R2 is an unsaturated hydrocarbon group having at least one double bond and R3 is a hydrocarbon group. The three components are kneaded into a final magnetic material.
    Type: Application
    Filed: July 10, 2002
    Publication date: February 20, 2003
    Applicant: Minebea Co., Ltd.
    Inventors: Takahiro Sasazawa, Yoshimichi Sakama