Patents Assigned to Casle Industrial Co., Ltd.
  • Method of attaching sheet filter to inlet opening of ventilation fan or range hood
    Patent number: 5107580
    Abstract: A method of attaching a sheet filter to an inlet opening by covering the inlet opening with a wide sheet filter and fixing the periphery of said sheet filter to the periphery of said inlet opening by use of magnet holders or other fixing means so as to enable a replacement of only the filter which has become dirty by the use.
    Type: Grant
    Filed: October 25, 1990
    Date of Patent: April 28, 1992
    Assignee: Casle Industrial Co., Ltd.
    Inventor: Kenji Watanabe