Patents by Inventor Hisayo Kitamaki

Hisayo Kitamaki 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).

  • Magnetic recording material
    Patent number: 4647507
    Abstract: A magnetic recording medium wherein a thin layer comprising an organic compound having at least one carboxyl or mercapto group, at least one fluoroalkyl group having 3 or more carbon atoms and at least one aliphatic alkyl group having 8 or more carbon atoms on its molecular terminals is formed on an oxygen-containing thin film of a ferromagnetic metal.The magnetic recording medium of the present invention is suitable for use as the magnetic recording media of magnetic tape, magnetic disk and the like and most suitable for use in rotating head type video tape recorders.
    Type: Grant
    Filed: October 24, 1985
    Date of Patent: March 3, 1987
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Takashi Suzuki, Masaru Odagiri, Yoshiaki Kai, Hisayo Kitamaki, Akio Tomago