Patents by Inventor Harufumi Senn

Harufumi Senn 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).

  • Hard magnetic materials
    Patent number: 4121952
    Abstract: Fine-grained sintered magnetic material having the composition expressed by SmMz where M is essentially cobalt or a combination of cobalt, iron and copper, exhibits a large coercive force critically when the z-value is in the vicinity of 8. As small amount of zinc can be added to the raw material to aid in the sintering of the material.
    Type: Grant
    Filed: October 7, 1977
    Date of Patent: October 24, 1978
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Harufumi Senn, Yoshio Tawara