Patents by Inventor Isami Koyama

Isami Koyama 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).

  • Patent number: 6237509
    Abstract: A synthetic resin pallet capable of enhancing a strength against a bending force acting in a direction right-angled to a loading surface without an increase in weight of the whole pallet. The synthetic resin pallet is constructed such that pallet constructive members taking configurations of the pallet being divided into upper and lower members are formed by, e.g., injection molding, then set facing to each other and integrally welded. A reinforced tape using a fiber reinforced material which is bendable is attached for reinforcement by the heat welding inside a groove formed on a surface of any one or both of the pallet constructive members in order to resist a bending force acting in a direction orthogonal to the surface thereof.
    Type: Grant
    Filed: October 25, 1999
    Date of Patent: May 29, 2001
    Assignees: Nippon Plastic Pallet Corporation, Mitsubishi Chemical Corporation, Dainippon Ink and Chemicals, Inc.
    Inventors: Satoshi Ishido, Yuzo Hayakawa, Isami Koyama