Patents by Inventor Ogawa Kazufumi

Ogawa Kazufumi 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).

  • Patent number: 5443901
    Abstract: A magnetic recording film, which has excellent slip durability, is run-proof and wear-proof as well as self-lubricating, is obtained by forming a chemically adsorbed film composed of straight carbon chain surface active materials having different carbon numbers, the chemically adsorbed film being chemically bonded via siloxane covalently bonds.In the method of manufacture, a magnetic recording medium, e.g., a hard disk, is contacted with a solution which is made by dissolving a straight carbon chain surface active material having a chlorosilyl group at one end and a fluorocarbon or hydrocarbon group at the other end in a non-aqueous solvent, thereby chemically bonding the chlorosilane-based straight chain surface active material to the surface of the magnetic recording medium via siloxane covalently bonds.
    Type: Grant
    Filed: November 22, 1993
    Date of Patent: August 22, 1995
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Norihisa Mino, Mamoru Soga, Ogawa Kazufumi
  • Patent number: 4523102
    Abstract: In a step for bonding a color filter to a solid-state color-image sensor chip with an adhesive which is curable not only by light or more particularly ultraviolet-ray irradiation but also by heating, pre-curing or partial curing is effected by irradiating light rays after the color filter and the chip has been pressed against each other and correctly aligned with each other in a bonding device and then the chip with the partially-bonded color filter is removed from the bonding device and complete curing of the adhesive is accomplished by heating. According to one embodiment of the present invention the bonding step is carried out in an atmosphere containing the oxygen so that the adhesive which has been squeezed out from the space between the color filter and the chip may be prevented from being cured and subsequently removed in a simple manner.
    Type: Grant
    Filed: January 31, 1983
    Date of Patent: June 11, 1985
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Ogawa Kazufumi, Shigeru Kondo, Yoshiko Yasuda, Taketoshi Yonezawa, Isamu Kitahiro