Patents by Inventor Sumio Nagai

Sumio Nagai 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).

  • Sandwich panel, method of forming core material for sandwich panel, and method of forming sandwich panel
    Patent number: 9283895
    Abstract: An object of the present invention is to provide a sandwich panel which is capable of securing its flexural or its shear rigidity as a whole and securing a compression rigidity of a core material itself, while at the same time of readily reducing the weight of the sandwich panel.
    Type: Grant
    Filed: October 31, 2009
    Date of Patent: March 15, 2016
    Assignee: KYORAKU CO., LTD.
    Inventors: Takehiko Sumi, Sumio Nagai, Tadatoshi Tanji
  • SANDWICH PANEL, METHOD OF FORMING CORE MATERIAL FOR SANDWICH PANEL, AND METHOD OF FORMING SANDWICH PANEL
    Publication number: 20110250384
    Abstract: An object of the present invention is to provide a sandwich panel which is capable of securing its flexural or its shear rigidity as a whole and securing a compression rigidity of a core material itself, while at the same time of readily reducing the weight of the sandwich panel.
    Type: Application
    Filed: October 31, 2009
    Publication date: October 13, 2011
    Inventors: Takehiko Sumi, Sumio Nagai, Tadatoshi Tanji