Patents by Inventor Tokitsugu Ishikawa

Tokitsugu Ishikawa 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).

  • Extruding die for a honeycomb structure
    Patent number: 5807590
    Abstract: The object is to provide an extruding die which is easy to be cleaned and which suffers no unreasonable force during the extrusion.The extruding die for extruding a honeycomb structure comprises at least two components, a first component and a second component, which are detachable. The first component includes a plurality of supporting bars disposed parallel to each other at regular intervals each of which has hexagonal posts erected thereon at regular intervals. The second component includes a plurality of supporting bars disposed parallel to each other at regular intervals, each of which is fitted in the channels formed on the lower surfaces of the hexagonal posts of the first component, and each of which has hexagonal posts erected thereon at regular intervals and disposed parallel to each other between the hexagonal posts of the first component.
    Type: Grant
    Filed: May 15, 1997
    Date of Patent: September 15, 1998
    Inventors: Tokitsugu Ishikawa, Tomoshi Sumiya