Patents by Inventor Tetsuji Sagisaka

Tetsuji Sagisaka 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 device and laser processing method
    Patent number: 5171963
    Abstract: A laser processing device includes a Z stage movable in the up and down directions with respect to a XY stage movable in the X, Y directions on which an object to be processed is provided. The surface of the object to be processed is image-sensed by a CCD camera through a lens of an electrically-driven revolver attached to the Z stage, which is projected in a monitor. When a defect of the object is displayed in the monitor, a laser beam is radiated to a defective portion of the object from a laser head provided in the Z stage and the defective portion is removed.
    Type: Grant
    Filed: May 16, 1991
    Date of Patent: December 15, 1992
    Assignee: NTN Corporation
    Inventors: Masahiro Saruta, Tetsuji Sagisaka, Kazunari Maeda, Takumi Yashiki