Patents by Inventor Michio Osawa

Michio Osawa 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).

  • Battery sealing inspection method
    Patent number: 6635379
    Abstract: A battery which has undergone initial charging and discharging is placed inside a sealed vessel, which is evacuated by a vacuum pump. After this evacuated state has been maintained for a while, the density of hydrogen gas within the sealed vessel is measured by a hydrogen density sensor, based on which the presence or absence of a gas escape from the battery is determined. The battery may be heated instead of subjecting it to charging and discharging.
    Type: Grant
    Filed: February 21, 2001
    Date of Patent: October 21, 2003
    Assignees: Matsushita Electric Industrial Co., Ltd., Toyota Jidosha Kabushiki Kaisha
    Inventors: Masato Onishi, Michio Osawa, Katsuyuki Tomioka, Noriyuki Fujioka, Tomoharu Saito
  • Battery sealing inspection method
    Publication number: 20010016278
    Abstract: A battery which has undergone initial charging and discharging is placed inside a sealed vessel, which is evacuated by a vacuum pump. After this evacuated state has been maintained for a while, the density of hydrogen gas within the sealed vessel is measured by a hydrogen density sensor, based on which the presence or absence of a gas escape from the battery is determined. The battery may be heated instead of subjecting it to charging and discharging.
    Type: Application
    Filed: February 21, 2001
    Publication date: August 23, 2001
    Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO.,LTD.
    Inventors: Masato Onishi, Michio Osawa, Katsuyuki Tomioka, Noriyuki Fujioka, Tomoharu Saito
  • Magnetic recording medium having an enhanced diamond bonding ratio and a method for the manufacture thereof
    Patent number: 5614314
    Abstract: A magnetic recording medium and a method for the manufacture thereof are disclosed that are less likely to result in head crushing even if high-hardness slider materials are used, and which is formed with a carbon protective layer that has good anti-CSS characteristics. The carbon protective layer is formed using a sputtering gas mixed with methane at a greater amount than predetermined to form a carbon protective layer in which diamond bonds are present at a higher ratio than graphite bonds, and polymeric bonds are present to an adequate degree. A magnetic recording medium having such a carbon protective layer shows a very high durability in a CSS cycle test.
    Type: Grant
    Filed: October 28, 1993
    Date of Patent: March 25, 1997
    Assignee: Fuji Electric Co., Ltd.
    Inventors: Yoshiaki Itoh, Michio Osawa, Youichi Tei, Yoshiharu Kashiwakura, Michinori Nishimura, Kazuo Nimura