Patents by Inventor Naoharu Horino

Naoharu Horino 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).

  • Method of and apparatus for embedding data into an electronic document by modulating spaces between words
    Patent number: 5861619
    Abstract: In a method of coding an electronic text document, the length of a space preceding a word in a line of text data of an electronic document relative to the length of a space following the word is modulated with the value of a bit of signature data. The signature data are thus embedded into the text data of the electronic document, not being easily discernible to illicit readers.
    Type: Grant
    Filed: December 13, 1996
    Date of Patent: January 19, 1999
    Assignee: Oki Electric Industry Co., Ltd.
    Inventors: Naoharu Horino, Masayuki Suto, Kineo Matsui