Patents by Inventor Yoshiki Akamatsu

Yoshiki Akamatsu 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).

  • Laser processing apparatus
    Patent number: 12009229
    Abstract: A laser beam irradiating unit of a laser processing apparatus includes a laser oscillator, a mirror configured to reflect a laser beam emitted from the laser oscillator and propagate the laser beam to a processing point, a power measuring unit configured to measure power of leakage light of the laser beam transmitted without being reflected by the mirror, and a condensing lens configured to condense the laser beam propagated by the mirror and irradiate a workpiece with the condensed laser beam. The control unit measures the power of the leakage light of the laser beam by the power measuring unit while irradiating the workpiece with the laser beam.
    Type: Grant
    Filed: August 26, 2020
    Date of Patent: June 11, 2024
    Assignee: DISCO CORPORATION
    Inventors: Hiroki Uryu, Seiji Miura, Haruhiko Asahi, Hisatoshi Fujisawa, Yoshiki Kobayashi, Hidenori Akamatsu
  • Resistor and electron device employing the same
    Patent number: 4804940
    Abstract: A resistor is provided with a plurality of turn parts whose corners have an obtuse flexional angle in order to improve the relative resistance precision. A ladder resistor can be formed with a plurality of such resistors connected in series, and various electronic devices are formed employing the ladder resistor.
    Type: Grant
    Filed: March 25, 1986
    Date of Patent: February 14, 1989
    Assignees: Hitachi, Ltd., Hitachi Microcomputer Eng.
    Inventors: Akira Takigawa, Shizuo Kondo, Masumi Kasahara, Toshinori Hirashima, Mikio Haijima, Setsuo Ogura, Osamu Takada, Yoshiki Akamatsu