Patents by Inventor Akira Okazoe

Akira Okazoe 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).

  • Ferro-magnetic acicular particles for recording medium and process for preparing the same
    Patent number: 4122216
    Abstract: Ferro-magnetic, acicular particles for a recording medium prepared by treating metal hydroxides, the metal component mainly consisting of iron and cobalt, with an oxidative gas in an aqueous alkaline medium wherein magnetic, acicular particles of iron oxide are present and crystallizing metal oxides resulting from the oxidation of the metal hydroxides on the surface of the magnetic, acicular particles of iron oxide.
    Type: Grant
    Filed: June 30, 1977
    Date of Patent: October 24, 1978
    Assignee: Hitachi Maxell, Ltd.
    Inventor: Akira Okazoe