Patents by Inventor Yoshimitsu Mashiko

Yoshimitsu Mashiko 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).

  • Respiratory protection device
    Patent number: 10010728
    Abstract: A respiratory protection device in which a plurality of filter units are provided. A respiratory protection device includes a plurality of filter units. Air flow paths that extend to the facepiece are provided in respective filter units. An inhalation port leading in the facepiece is provided at a portion where the air flow paths merge. The inhalation port can be temporarily closed by using an inspection valve included in the fit checker.
    Type: Grant
    Filed: June 3, 2013
    Date of Patent: July 3, 2018
    Assignee: KOKEN LTD.
    Inventor: Yoshimitsu Mashiko
  • RESPIRATORY PROTECTION DEVICE
    Publication number: 20150107596
    Abstract: A respiratory protection device in which a plurality of filter units are provided. A respiratory protection device includes a plurality of filter units. Air flow paths that extend to the facepiece are provided in respective filter units. An inhalation port leading in the facepiece is provided at a portion where the air flow paths merge. The inhalation port can be temporarily closed by using an inspection valve included in the fit checker.
    Type: Application
    Filed: June 3, 2013
    Publication date: April 23, 2015
    Inventor: Yoshimitsu Mashiko