Patents by Inventor Tohru Asakura

Tohru Asakura 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).

  • Card-type electronic device with plastic frame sandwiched between printed circuit board and metal panel
    Patent number: 5995372
    Abstract: A card-type electronic device, such as a memory card, has a package structure in which a reduction in thickness is achieved while retaining the shielding effect and in which, if the device should be inserted incorrectly, no power source short-circuiting occurs without a mechanism for preventing incorrect insertion. The memory card 20 has a one-side-metal-plate type package structure and includes a plastic frame 11, a printed circuit board 12 which has a card contact edge section 14 for an input/output interface at an end thereof and on which semiconductor memory devices are mounted, and a metal panel 13. The plastic frame 11 is placed between the printed circuit board 12 and the metal plate 13. The distance D.sub.
    Type: Grant
    Filed: January 6, 1999
    Date of Patent: November 30, 1999
    Assignee: Seiko Epson Corporation
    Inventor: Tohru Asakura
  • Card-type electronic device with plastic frame sandwiched between printed circuit boarding metal panel
    Patent number: 5784259
    Abstract: A card-type electronic device, such as a memory card, has a package structure in which a reduction in thickness is achieved while retaining the shielding effect and in which, if the device should be inserted incorrectly, no power source short-circuiting occurs without a mechanism for preventing incorrect insertion. The memory card 20 has a one-side-metal-plate type package structure and includes a plastic frame 11, a printed circuit board 12 which has a card contact edge section 14 for an input/output interface at an end thereof and on which semiconductor memory devices are mounted, and a metal panel 13. The plastic frame 11 is placed between the printed circuit board 12 and the metal plate 13. The distance D.sub.
    Type: Grant
    Filed: July 9, 1997
    Date of Patent: July 21, 1998
    Assignee: Seiko Epson Corporation
    Inventor: Tohru Asakura
  • Card-type electronic device with plastic frame sandwiched between printed circuit board and metal panel
    Patent number: 5742479
    Abstract: A card-type electronic device, such as a memory card, has a package structure in which a reduction in thickness is achieved while retaining the shielding effect and in which, if the device should be inserted incorrectly, no power source short-circuiting occurs without a mechanism for preventing incorrect insertion. The memory card 20 has a one-side-metal-plate type package structure and includes a plastic frame 11, a printed circuit board 12 which has a card contact edge section 14 for an input/output interface at an end thereof and on which semiconductor memory devices are mounted, and a metal panel 13. The plastic frame 11 is placed between the printed circuit board 12 and the metal plate 13. The distance D.sub.
    Type: Grant
    Filed: February 14, 1996
    Date of Patent: April 21, 1998
    Assignee: Seiko Epson Corporation
    Inventor: Tohru Asakura