Patents by Inventor Masami Ohsawa

Masami Ohsawa 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).

  • Fiber optic laser conducting probe for photodynamic therapy
    Patent number: 5976175
    Abstract: A fiber optic laser conducting probe is used for photodynamic therapy. In this fiber optic laser conducting probe, an optical fiber has an end used for conducting a pulse laser beam. The laser beam is conducted through the optical fiber and irradiated from the end. A end tip is made of polyamide resin. The end tip has a hollow portion, and is attached to the end of the optical fiber such that the pulse laser beam can be irradiated through the end of the optical fiber, through the hollow portion and through the end tip.
    Type: Grant
    Filed: June 18, 1996
    Date of Patent: November 2, 1999
    Assignees: Lederle (Japan), Ltd., Hamamatsu Photonics K.K., Moritex Corp.
    Inventors: Toru Hirano, Akio Tanaka, Masami Ohsawa, Takuya Kohno
  • Optical fiber laser device
    Patent number: 5579423
    Abstract: A plane side of a semispherical lens is opposed to an end of optical fibers for guiding a pulse laser beam, and a semispherical lens is disposed in a predetermined spaced relation.
    Type: Grant
    Filed: July 28, 1995
    Date of Patent: November 26, 1996
    Assignees: Lederle (Japan), Ltd., Hamamatsu Photonics K.K., Moritex Corp.
    Inventors: Akio Tanaka, Toru Hirano, Takuya Kohno, Masami Ohsawa
  • Fiber optic laser conducting and diffusion device
    Patent number: 5530780
    Abstract: A polyolefin resin light diffusion tip is attached to an optical fiber end for conducting a pulse laser beam.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: June 25, 1996
    Assignees: Lederle (Japan), Ltd., Hamamatsu Photonics K.K., Moritex Corp.
    Inventor: Masami Ohsawa
  • Optical fiber laser device for transmitting a pulse laser beam
    Patent number: 5361316
    Abstract: An optical fiber laser device, used as a pulse laser device, has a spherical lens made of optical glass having a refractive index of 2 or less. The spherical lens is provided on an extreme end of an optical fiber which guides a pulse laser beam. An object side of the spherical lens is projected externally of a base housing the spherical lens therein.
    Type: Grant
    Filed: November 23, 1993
    Date of Patent: November 1, 1994
    Assignees: Lederle (Japan) Ltd., Hamamatsu Photonics K.K., Moritex Corporation
    Inventors: Akio Tanaka, Toru Hirano, Masami Ohsawa