Patents by Inventor Akira Sogawa

Akira Sogawa 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: 5168880
    Abstract: A method of heating a tract organ of the living body with high-frequency electric current, includes the step of controlling a flow volume of a coolant supplied into a first electrode so as to be substantially equal to that of a blood which flows in a living body tissue at a portion where the first electrode is disposed while controlling a temperature of the coolant to a temperature range of the living body tissue at the portion, the coolant being an aqueous solution of salts at a predetermined concentration.The method makes it possible to effect safely a hyperthermic treatment.An apparatus for carrying out the method is also disclosed.
    Type: Grant
    Filed: September 19, 1990
    Date of Patent: December 8, 1992
    Assignee: Olympus Optical Co., Ltd.
    Inventors: Akira Sogawa, Tadashi Onuma, Atsushi Yoshihara, Kiyoshi Kitagawa, Chikau Onodera
  • Patent number: 5086786
    Abstract: An electrode device for heating a tumor in an endotract organ by high frequency convergent electric current has a container of a flexible polymeric material provided with thick side wall, a thick bottom wall connected to one end of the side wall and an opening defined by the other end of the side wall. The device further has a deformable electrode member disposed near an inner surface of the thick bottom wall, and a flexible polymeric film fluid-tightly attached to the other end of the thick side wall. A mesh-like member of a flexible polymeric material is disposed between the electrode member and the flexible polymeric film, and has a plurality of first passages leading to a top surface thereof and a bottom surface thereof, and a plurality of second passages each communicating the first passages with each other.
    Type: Grant
    Filed: March 14, 1990
    Date of Patent: February 11, 1992
    Assignee: Kureha Kagaku Kogyo Kabushiki Kaisha
    Inventors: Akira Sogawa, Kiyoshi Kitagawa, Chikau Onodera, Tadashi Onuma
  • Patent number: 4961435
    Abstract: A high-frequency capacitive heating electrode device comprises a cap-shaped electrode, a flexible support for supporting the electrode with one end thereof capped with the electrode, a flexible polymer film which surrounds the electrode and forms a gastight space between the support and the flexible polymer film, and passages for respectively introducing and discharging a cooling medium to and from the gastight space. The high-frequency capacitive heating electrode device is disposed in the vicinity of the target portion of a living body to be heated and is useful for the hyperthermia therapy for a cancer of the uterine cervix.
    Type: Grant
    Filed: October 17, 1988
    Date of Patent: October 9, 1990
    Assignee: Kureha Kagaku Kogyo Kabushiki Kaishi
    Inventors: Kiyoshi Kitagawa, Yoshio Hosoi, Akira Sogawa, Chikau Onodera, Tadashi Onuma
  • Patent number: 4887614
    Abstract: A medical electrode device comprises a flexible bag-like member which is formed on the side in direct contact with a living body and to and from which is charged and discharged a cooling medium, and a flexible electrode secured to the bag-like member, wherein an inner surface of the flexible bag-like member is at least partially joined to the other opposing inner surface of the bag-like member to each other so as to form a partitioned flow channel for the cooling medium in the inside of the bag-like member. The medical electrode device, when applied to the surface of a living body with a small radius of curvature, can be in an intimate contact with the living body without disturbing the distribution of the electric field, can attain a satisfactory cooling effect due to the use of a direct cooling system and the uniform flow distribution of water through the partitioned flow channel, and can perform efficient warming of the targeted lesion in the living body.
    Type: Grant
    Filed: April 18, 1989
    Date of Patent: December 19, 1989
    Assignee: Kureha Kagaku Kogyo Kabushiki Kaisha
    Inventors: Toshiharu Shirakami, Akira Sogawa
  • Patent number: 4662383
    Abstract: An endotract antenna used for hyperthermia treatments. A microwave radiation antenna is surrounded by a balloon-like member made of a thin polymeric film. Tubes for feeding and draining a cooling liquid to and from the inside of the balloon-like member enable the device to effectively warm an endotract lesion such as a tumor by effectively supplying the energy of the microwaves emitted from the antenna to the endotract lesion.
    Type: Grant
    Filed: September 23, 1983
    Date of Patent: May 5, 1987
    Assignee: Kureha Kagaku Kogyo Kabushiki Kaisha
    Inventors: Akira Sogawa, Kiyoshi Inokuchi, Keizo Sugimachi, Hidenobu Kai, Tetsuya Hotta, Yoshio Kawai