Patents by Inventor Kohshi Yosimura

Kohshi Yosimura 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).

  • Permanent magnet for ultra-high vacuum and production process thereof
    Patent number: 6080498
    Abstract: A permanent magnet useful in an ultra-high vacuum atmosphere, such as an undulator requiring the ultra-high vacuum atmosphere of less than 1.times.10.sup.-9 Pa and which, has excellent magnetic characteristics, includes an R-Fe-B system permanent magnet having a Ti undercoat layer on a surface thereof, an external layer selected from TiN, AlN and Ti.sub.1-x Al.sub.x N (x is 0.03 to 0.70), and an Al intermediate layer therebetween.
    Type: Grant
    Filed: August 5, 1997
    Date of Patent: June 27, 2000
    Assignee: Sumitomo Special Metals Co., Ltd.
    Inventors: Fumiaki Kikui, Masako Ikegami, Kohshi Yosimura