Patents by Inventor Kiyoharu Ozone

Kiyoharu Ozone 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).

  • Ink pen device
    Patent number: 4054883
    Abstract: An ink pen has an ink tank for supplying ink to a pen nib such as a needle or capillary tube nib. The ink tank is connected to a change-over valve by way of an air pipe. The valve opens the ink tank into a positive pressurized air source for pressing ink out in good moderation through the nib during writing or drawing operation of the ink pen. On the other hand, when the ink pen is stopped to operate writing or drawing, the valve opens the ink tank in turn into a negative pressurized air source for preventing ink in the tank from leaking out or dropping down through the nib.
    Type: Grant
    Filed: March 11, 1976
    Date of Patent: October 18, 1977
    Assignee: Kabushiki Kaisha Daini Seikosha
    Inventor: Kiyoharu Ozone