Patents by Inventor Kazutoshi Hirai

Kazutoshi Hirai 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).

  • Cleaning-Fin for Removing Dirt in a Gap and Cleaning-Tool
    Publication number: 20070246061
    Abstract: The present invention discloses a cleaning-fin for removing dirt in a gap. The cleaning-fin is formed by a flexible-elastic material, and is fixed in a head of an operation tool. The cleaning-fin comprises a spatulate apical portion, a pair of bottom portions fixed in the head having therebetween an interval, and a pair of side walls connecting the spatulate apical portion and each of the bottom portions. The pair of side walls form therebetween a hollow triangle which becomes narrower toward the spatulate apical portion.
    Type: Application
    Filed: April 14, 2005
    Publication date: October 25, 2007
    Inventor: Kazutoshi Hirai