Patents by Inventor Atuo Tomioka

Atuo Tomioka 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).

  • Process and apparatus for analyzing cells
    Patent number: 5088816
    Abstract: A cell analyzing system flows a liquid to be tested and a sheath liquid through a flattened flow passage. An image of the flattened flow passage is formed at two different magnifications. The thickness of the liquid to be tested in the flattened flow passage is changed between the two different magnifications to maintain this thickness at a value smaller than a depth of field of the apparatus forming the image. The thickness of the liquid to be tested is changed by changing its flow relationship to the sheath liquid.
    Type: Grant
    Filed: March 6, 1990
    Date of Patent: February 18, 1992
    Assignee: TOA Medical Electronics Co., Ltd.
    Inventors: Atuo Tomioka, Masayuki Nakagawa, Tadashi Maeda
  • Process and apparatus for analyzing cells
    Patent number: RE35227
    Abstract: A cell analyzing system flows a liquid to be tested and a sheath liquid through a flattened flow passage. An image of the flattened flow passage is formed at two different magnifications. The thickness of the liquid to be tested in the flattened flow passage is changed between the two different magnifications to maintain this thickness at a value smaller than a depth of field of the apparatus forming the image. The thickness of the liquid to be tested is changed by changing its flow relationship to the sheath liquid.
    Type: Grant
    Filed: February 17, 1994
    Date of Patent: May 7, 1996
    Assignee: Toa Medical Electronics Co., Ltd.
    Inventors: Atuo Tomioka, Masayuki Nakagawa, Tadashi Maeda