Patents by Inventor Takehiko Iwai

Takehiko Iwai 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).

  • Substitute blood vessel and a process for preparing the same
    Patent number: 4098571
    Abstract: A process for preparing a heterograft substitute blood vessel comprises digesting a properly pretreated pig blood vessel with a digesting solution containing an animal proteolytic enzyme so as to retain collagenous and elastic fiber constituents substantially in the original state and substantially remove away other tissue constituents of said blood vessel than said two kinds of constituents, and then fixing the resulting digested blood vessel into a desired shape with a liquid fixing agent.
    Type: Grant
    Filed: August 4, 1976
    Date of Patent: July 4, 1978
    Assignees: Kaneyasu Miyata, Izumi Amano, Kohei Toda
    Inventors: Kaneyasu Miyata, Izumi Amano, Takehiko Iwai, Tetsuya Asahi