Patents by Inventor Seiji Masumura

Seiji Masumura 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).

  • Oxygen concentrating apparatus
    Patent number: D693005
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: November 5, 2013
    Assignee: Teijin Pharma Limited
    Inventors: Hideo Nawata, Hisashi Kiriake, Seiji Masumura