Patents by Inventor Keisuke Hatta

Keisuke Hatta 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).

  • Medical oxygen concentrator
    Patent number: D854161
    Type: Grant
    Filed: May 15, 2018
    Date of Patent: July 16, 2019
    Assignee: NGK SPARK PLUG CO., LTD.
    Inventors: Masanori Suda, Taku Hirano, Keisuke Hatta, Keiko Nii
  • Medical oxygen concentrator
    Patent number: D861874
    Type: Grant
    Filed: May 15, 2018
    Date of Patent: October 1, 2019
    Assignee: NGK SPARK PLUG CO., LTD.
    Inventors: Taku Hirano, Masanori Suda, Keiko Nii, Keisuke Hatta