Patents Assigned to Yugen Kaisha Shinnihon Seisakusho
  • Shaped frame material for use in forming pit frames
    Patent number: 4319438
    Abstract: A multi-purpose shaped frame material for use in forming pit frames, which can be used in three modes in accordance with the structure of a pit, which is used for wiring, piping, draining and ventilation, the material of which a lid member is made, and the thickness of the lid member.
    Type: Grant
    Filed: May 8, 1980
    Date of Patent: March 16, 1982
    Assignee: Yugen Kaisha Shinnihon Seisakusho
    Inventor: Kiichiro Mikajiri