Patents Assigned to Kikuo Yamada
  • Cleaning sheet
    Patent number: 8225453
    Abstract: Provided is a cleaning sheet in which a plurality of fiber bound materials produced by bundling a lot of fibers is joined on a base sheet, and at least adjacent two bound fiber materials have respectively different length in the longitudinal direction of the fibers, to constitute a cleaning portion and which can sufficiently wipe off even relatively large dirt particles.
    Type: Grant
    Filed: December 28, 2007
    Date of Patent: July 24, 2012
    Assignee: Kikuo Yamada
    Inventor: Kikuo Yamada