Patents by Inventor Kojiro Matsushima

Kojiro Matsushima 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).

  • Pressure-sensitive transfer correction tape
    Patent number: 5997994
    Abstract: The object of the present invention is to provide a pressure-sensitive correction tape having concealing properties and improvements in deterioration with time in an adhesive layer while not causing any blocking phenomenon and being excellent transfer cutting properties. The present invention relates to a pressure-sensitive transfer correction tape comprising a correction concealing layer on one side of a sheet substrate and a pressure-sensitive adhesive layer provided thereon containing a concealing material wherein the thickness in total of the pressure-sensitive adhesive layer and the correction concealing layer is 50 .mu.m or less and the ratio in thickness of the pressure-sensitive adhesive layer and the correction concealing layer is in the range of 1:1 to 1:4.
    Type: Grant
    Filed: October 26, 1998
    Date of Patent: December 7, 1999
    Assignee: Tombow Pencil Co., Ltd.
    Inventor: Kojiro Matsushima