Patents by Inventor Natsuo Yasui

Natsuo Yasui 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).

  • Artificial vertebral body
    Patent number: 5290312
    Abstract: A prosthetic vertebra has a first hollow parallelepiped-shaped component and a second component shaped identically to the first component and marginally smaller than the first component. The second component can accordingly be positioned partially within the first component and can be axially moved within the first component, so that the overall length of the prosthetic vertebra can be established by appropriately moving the second component within the first. A set screw is threadably engageable with the first component and can be tightened against the second component to hold the components axially stationary relative to each other, once the prosthetic vertebra has been positioned in the patient and its length adjusted as appropriate to fit the patient.
    Type: Grant
    Filed: September 3, 1991
    Date of Patent: March 1, 1994
    Assignee: Alphatec
    Inventors: Haruo Kojimoto, Natsuo Yasui