Patents by Inventor Takeshi Ikuma

Takeshi Ikuma 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).

  • Resin bound magnet and its production process
    Patent number: 5464670
    Abstract: A resin bonded magnet including a rare earth magnetic powder and an organic resin moulded into a single body having a cylindrical form. The resin bonded magnet satisfies the condition:2 DL/d.sup.2 .gtoreq.1.56where D is the outer diameter of the magnet, d is the inner diameter, and L is the magnet's length. The rare earth magnetic powder has a coercivity between 7 kOe and 12 kOe. The magnetic powder has an average particle size, r, satisfying:1 .mu.m.ltoreq.r.ltoreq.0.1 t(t.ltoreq.1 mm)where t is the thickness of the moulded article.
    Type: Grant
    Filed: January 31, 1994
    Date of Patent: November 7, 1995
    Assignee: Seiko Epson Corporation
    Inventors: Takeshi Ikuma, Masaaki Sakata, Hiroharu Akioka, Tatsuya Shimod