Patents by Inventor Shigeaki Funaki

Shigeaki Funaki 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).

  • Copy protection method and system for programmable gate array
    Patent number: 7613931
    Abstract: The present invention relates to a programmable-gate-array copy protection method and a system which prevent unauthorized copying of an FPGA program. A copy protection method for a field-programmable gate array, the method comprising a step of causing a user-specific gate array to boot a user circuit data to the field-programmable gate array, the user-specific gate array being connected to the field-programmable gate array and a memory device in which the user circuit data is stored and being pre-programmed at a semiconductor-vender's factory.
    Type: Grant
    Filed: July 22, 2005
    Date of Patent: November 3, 2009
    Assignees: NEC Electronics Corporation, Mikasa Shoji Co., Ltd.
    Inventors: Masahiro Tonami, Kozaburo Nakamura, Atsushi Kondo, Shigeaki Funaki, Koji Yasuda
  • Copy protection method and system for programmable gate array
    Publication number: 20060020907
    Abstract: The present invention relates to a programmable-gate-array copy protection method and a system which prevent unauthorized copying of an FPGA program. A copy protection method for a field-programmable gate array, the method comprising a step of causing a user-specific gate array to boot a user circuit data to the field-programmable gate array, the user-specific gate array being connected to the field-programmable gate array and a memory device in which the user circuit data is stored and being pre-programmed at a semiconductor-vender's factory.
    Type: Application
    Filed: July 22, 2005
    Publication date: January 26, 2006
    Inventors: Masahiro Tonami, Kozaburo Nakamura, Atsushi Kondo, Shigeaki Funaki, Koji Yasuda