Patents Assigned to The Local Government of Osaka Prefecture
  • Method and apparatus for metal surface process by laser beam
    Patent number: 5072091
    Abstract: The method and apparatus for processing metal surfaces by forming the fine irregularity patterns onto metal surfaces in accordance with both of the strong and weak patterns characterized by the interference light on the metal surfaces under the irradiation of the interference light of laser beam onto the metal surfaces is described.
    Type: Grant
    Filed: February 16, 1990
    Date of Patent: December 10, 1991
    Assignees: The Local Government of Osaka Prefecture, Osakafuji Kogyo Co., Ltd.
    Inventors: Itsuo Nagata, Hiroki Miyamoto, Kosuke Moriwaki, Ichiro Oshima, Tokihiko Oshima, Shigekazu Hirata, Yoshikazu Okano