Patents by Inventor Eiji Kawaguchi

Eiji Kawaguchi 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).

  • Publication number: 20220310307
    Abstract: An ignition coil for use in an internal combustion engine includes a coil assembly including a primary coil and a secondary coil, a lead terminal electrically connected to the secondary coil, a noise prevention resistor connected to a spark plug, and a case. An internal space of the case includes a first space holding the coil assembly and the lead terminal and a second space including the noise prevention resistor. The case includes a pair of guides protruding toward the first space. The lead terminal passes through a gap between the pair of guides and is in contact with an exposed surface of the noise prevention resistor. This can reduce deviation of the lead terminal. As a result, the secondary coil and the noise prevention resistor can be electrically connected to each other without intervention of a high-voltage terminal therebetween.
    Type: Application
    Filed: February 14, 2022
    Publication date: September 29, 2022
    Inventors: Kohei ADACHI, Shintaro YAMAMURA, Eiji KAWAGUCHI
  • Patent number: 7231049
    Abstract: An electronic mail system and method in which a message receiver creates an envelope containing envelope media data that is hidden with an embedding-and-extracting key. The message sender acquires the message receiver's envelope and, using an embedding-and-extracting key, embeds a secret message in the acquired envelope media data. The embedded envelope is sent to the message receiver, who extracts the secret message from the received embedded envelope using the same embedding-and-extracting key used to embed the data. As a result a secret message can be sent from the sender to the receiver without being eavesdropped on during the communication.
    Type: Grant
    Filed: December 3, 2002
    Date of Patent: June 12, 2007
    Inventors: Eiji Kawaguchi, Richard Eason
  • Patent number: 6978035
    Abstract: An information hiding system that hides information-data in the printing-data according to steganography using an embedding means, and produces printed matter by printing out the printing-data on printable media. A scanner is used to read the data, such as image or pattern data, from the printed matter in order to restore the printing-data. The hidden information-data is then extracted from the restored printing-data using an information-data extracting means. Finally, the information-data is outputted in such a form as an image, musical or voice sound, and/or character letters according to the outputting means.
    Type: Grant
    Filed: March 27, 2001
    Date of Patent: December 20, 2005
    Assignee: ASA Systems, Inc.
    Inventors: Eiji Kawaguchi, Richard Eason, Kunihiro Tsuda
  • Patent number: 6742712
    Abstract: An information card and card system that eliminates forgery and illegal use of a card. The information card includes a memory that stores information data, which includes one of image data and acoustic data and contains inherent data that is embedded in the information data according to steganographic information hiding. The inherent data is data that authenticates a legitimacy of a card owner of the information card. The information card system include the information card and a data processing terminal for authenticating the owner of the card and/or the authenticity of the card itself.
    Type: Grant
    Filed: July 23, 2001
    Date of Patent: June 1, 2004
    Assignee: ASA Systems, Inc.
    Inventors: Eiji Kawaguchi, Richard Eason, Kunihiro Tsuda
  • Patent number: 6697498
    Abstract: A method and computer program product for embedding information within an indexed color image such that the existence of the data is not recognizable by the human eye. The method includes the steps of altering color image data, such that it will not cause a large color change in the representing image, and hiding information using an information hiding method. The altering step is accomplished via a color set changing method. The color set changing method involves first decomposing the image in to a set of color component images, embedding data in the color component or components, which the human visual system is most sensitive to, then merging representative colors until the number of representative colors is less than or equal to the target number of colors and reformatting the resulting image into indexed color image format.
    Type: Grant
    Filed: February 2, 2001
    Date of Patent: February 24, 2004
    Assignee: ASA Systems, Inc.
    Inventors: Eiji Kawaguchi, Richard Eason, Michiharu Niimi
  • Publication number: 20030142130
    Abstract: An electronic mail system and method in which a message receiver creates an envelope containing envelope media data that is hidden with an embedding-and-extracting key. The message sender acquires the message receiver's envelope and, using an embedding-and-extracting key, embeds a secret message in the acquired envelope media data. The embedded envelope is sent to the message receiver, who extracts the secret message from the received embedded envelope using the same embedding-and-extracting key used to embed the data. As a result a secret message can be sent from the sender to the receiver without being eavesdropped on during the communication.
    Type: Application
    Filed: December 3, 2002
    Publication date: July 31, 2003
    Inventors: Eiji Kawaguchi, Richard Eason
  • Patent number: 6473516
    Abstract: A technique for hiding information in an image that is based a property of the human vision system. Because of its relation to human vision properties, the technique of the present invention provides an information hiding capacity is as large as 50% of the original image data. The method includes the steps of segmenting each region of a vessel image into informative and noise-like regions by using a threshold value, arranging the data into a series of data blocks, and embedding each data block into the noise-like regions of the image.
    Type: Grant
    Filed: May 21, 1999
    Date of Patent: October 29, 2002
    Assignee: ASA Systems, Inc.
    Inventors: Eiji Kawaguchi, Richard O. Eason
  • Publication number: 20020051162
    Abstract: An information hiding system that hides information-data in the printing-data according to steganography using an embedding means, and produces printed matter by printing out the printing-data on printable media. A scanner is used to read the data, such as image or pattern data, from the printed matter in order to restore the printing-data. The hidden information-data is then extracted from the restored printing-data using an information-data extracting means. Finally, the information-data is outputted in such a form as an image, musical or voice sound, and/or character letters according to the outputting means.
    Type: Application
    Filed: March 27, 2001
    Publication date: May 2, 2002
    Applicant: ASA Systems, Inc.
    Inventors: Eiji Kawaguchi, Richard Eason, Kunihiro Tsuda
  • Publication number: 20020051559
    Abstract: Media data such as still image data is subjected to a wavelet transform, and then the wavelet coefficients are quantized. Bit-planes are prepared for the quantized wavelet coefficients. Confidential information is embedded into the bit-planes by using bit-plane decomposition steganography. The modified quantized wavelet coefficients are prepared based on the bit-planes into which the confidential information is embedded. Entropy encoding is performed on the modified quantized wavelet coefficients. As a result, the information is hidden in the media data subjected to progressive compression. On the other hand, entropy decoding is performed on the compressed data, into which the confidential information is embedded, to obtain quantized wavelet coefficients. A bit-plane structure is obtained from the quantized wavelet coefficients, and the hidden information is extracted from the bit-plane structure.
    Type: Application
    Filed: September 7, 2001
    Publication date: May 2, 2002
    Inventors: Hideki Noda, Eiji Kawaguchi, Richard Eason, Kunihiro Tsuda
  • Publication number: 20020031241
    Abstract: A method and computer program product for embedding information within an indexed color image such that the existence of the data is not recognizable by the human eye. The method includes the steps of altering color image data, such that it will not cause a large color change in the representing image, and hiding information using an information hiding method. The altering step is accomplished via a color set changing method. The color set changing method involves first decomposing the image in to a set of color component images, embedding data in the color component or components, which the human visual system is most sensitive to, then merging representative colors until the number of representative colors is less than or equal to the target number of colors and reformatting the resulting image into indexed color image format.
    Type: Application
    Filed: February 2, 2001
    Publication date: March 14, 2002
    Inventors: Eiji Kawaguchi, Richard O. Eason, Michiharu Niimi
  • Patent number: 5408459
    Abstract: An opening/closing door mechanism including an apparatus having predetermined recording and/or reproducing means for moving a cartridge having a predetermined shape in a substantially parallel state to perform insertion and ejection of the cartridge through an insertion/ejection opening in order to perform a recording and/or reproducing operation with respect to a medium incorporated in the cartridge, a panel main body having an opening portion arranged near the insertion/ejection opening to guide the cartridge so as to allow the cartridge to move, a first door including a pivot support portion having one end pivotally supported at one edge portion of the opening portion in a longitudinal direction thereof, and a lock portion, arranged near the pivot support portion, a first biasing spring for biasing the first door toward the front surface of the panel main body to cover the opening portion, a second door including a pivot support portion having one end pivotally supported near the edge portion and a locking
    Type: Grant
    Filed: June 28, 1993
    Date of Patent: April 18, 1995
    Assignees: Copal Company Limited, Fujitsu Limited
    Inventors: Eiji Kawaguchi, Katuyoshi Itoh, Fuminori Imamura