Patents by Inventor Takeshi Irita

Takeshi Irita 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: 6003419
    Abstract: A microcutting device incises minute samples of organisms, such as egg cells and protozoa, and the like. This device is made of a thin film plate which is formed by use of a semiconductor manufacturing technique, and has a heater in the vicinity of its cutting edge. The microcutting device is sharper than a metal-blade incision device and is suitable of mass production.
    Type: Grant
    Filed: February 27, 1998
    Date of Patent: December 21, 1999
    Assignee: Nikon Corporation
    Inventors: Takeshi Irita, Shinya Hara, Yoshihiko Suzuki
  • Patent number: 5289494
    Abstract: This invention relates to a distributed feedback semiconductor laser which achieves distributed feedback by gain coupling by providing periodical changes in the thickness of the active layer (5) or the absorptive layer, and aims to achieve light distributed feedback mainly of periodical perturbation of the gain factor by diminishing the periodical perturbation of refractive index caused by the changes in the thickness of the active layer (5) or the absorptive layer. This invention is characterized by a refractive index canceling structure comprising a combination of layers (6) and (7) of different refractive indices to cancel periodical changes in refractive index caused by the periodical structure of the active layer (5) or the absorptive layer.
    Type: Grant
    Filed: June 17, 1992
    Date of Patent: February 22, 1994
    Assignee: Optical Measurement Technology Development Co., Ltd.
    Inventors: Kunio Tada, Yoshiaki Nakano, Takeshi Inoue, Yi Luo, Takeshi Irita, Shin-ichi Nakajima, Hideto Iwaoka