Patents by Inventor Shigeyuki Hirata

Shigeyuki Hirata 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).

  • Mechanical heart valve and production method thereof
    Patent number: 6875230
    Abstract: An artificial heart valve comprising a tubular base body having sinuse(s) of Valsalva and valve cusp(s) provided inside the base body, characterized in that the base body and the valve cusps comprise a bioabsorbable polymer material.
    Type: Grant
    Filed: October 19, 2000
    Date of Patent: April 5, 2005
    Assignees: Gunze Limited, Tokyo Women's Medical University
    Inventors: Shinichiro Morita, Saburo Nakamura, Shigeyuki Hirata, Toshiharu Shin'oka, Yasuharu Imai
  • Process and apparatus for forming laminate by thermocompression bonding
    Patent number: 4861409
    Abstract: The invention provides a process and an apparatus for laminating a film 1 and a film 2 by thermocompression bonding.When the film 1 and the film 2 are laminated by thermocompressing bonding with a heat roll 3 and a pressure roll 4, the film 1 is guided onto the heat roll 3 via a feed angle adjusting roll 5 for automatically adjusting the distance of contact of the film with the heat roll 3, and/or the laminate film formed by thermocompression bonding is released from the heat roll 3 by being passed over a discharge angle adjusting roll 8 for automatically adjusting the distance of contact of the laminate film with the heat roll.
    Type: Grant
    Filed: October 30, 1987
    Date of Patent: August 29, 1989
    Assignee: Gunze Kabushiki Kaisha
    Inventors: Kenji Hashida, Takeshi Yamamoto, Tatsuya Fukumoto, Tetsuji Deguchi, Shigeyuki Hirata, Osamu Uehara, Kazuhiko Akebi