Patents by Inventor Takao Furuse

Takao Furuse 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).

  • Semiconductor laser
    Patent number: 4434491
    Abstract: A semiconductor laser of the rib guide type having the thickness of an active layer within a stripe-shaped region thicker than that of the outside, and thus the stripe-shaped region is made to have a waveguide action and, thereby, fundamental mode laser may be achieved.
    Type: Grant
    Filed: March 30, 1981
    Date of Patent: February 28, 1984
    Assignee: Nippon Electric Co., Ltd.
    Inventors: Isamu Sakuma, Katsuhiko Nishida, Hideo Kawano, Masayasu Ueno, Yoshishige Matsumoto, Shohei Matsumoto, Takao Furuse
  • Method of making a cold cathode gas laser discharge tube
    Patent number: 4012214
    Abstract: Use of press-molded flanged glass envelope members each including a central hollow cylindrical portion enables fabrication of high output cold cathode gas laser tubes of reduced axial length with materially reduced cost of production. The cylindrical portion of one of the envelope members surrounds one end region of the capillary tube thereby to prevent discharge concentration on the adjacent end region of the cylindrical cold cathode while that of the other envelope member serves to support the capillary tube at about the middle of its axial length, eliminating the need for a "flaring operation" requiring highly skilled labor.
    Type: Grant
    Filed: August 15, 1975
    Date of Patent: March 15, 1977
    Assignee: Nippon Electric Company, Ltd.
    Inventors: Takao Furuse, Akira Kuroiwa, Sadatane Sakuma