Patents by Inventor Manabu Sasamoto

Manabu Sasamoto 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).

  • Data encrypting/decrypting conversion methods and apparatuses and data communication system adopting the same
    Publication number: 20010014154
    Abstract: Encrypting/decrypting conversion method and apparatus capable of controlling dynamically cyclic shift independent of data to undergo encrypting/decrypting conversion includes two or more different fixed circulating shift processing means for shifting cyclically the data by a fixed bit number leftward or rightward, a cyclic shift processing selecting means for selecting fixed cyclic shift processing means. The selecting sequence determined by the cyclic shift processing means is determined on the basis of data for determining the shift number selecting sequence.
    Type: Application
    Filed: March 19, 2001
    Publication date: August 16, 2001
    Applicant: Hitachi, Ltd.
    Inventors: Makoto Aikawa, Kazuo Takaragi, Hiroyuki Koreeda, Manabu Sasamoto, Hiroo Okamoto, Takaharu Noguchi, Soichi Furuya, Shigeru Hirahata
  • Information receiving and recording/reproducing apparatus/method having function for limiting/delimiting for protecting copyright of recording information
    Patent number: 5912969
    Abstract: An apparatus comprising a transmission system for transmitting an information signal, and a reception system including an information receiving unit for receiving the information signal, and an information recording/reproducing unit for recording/reproducing the received information signal on/from a recording medium.
    Type: Grant
    Filed: December 18, 1997
    Date of Patent: June 15, 1999
    Assignee: Hitachi, Ltd.
    Inventors: Manabu Sasamoto, Nobutaka Amada, Takao Arai, Takaharu Noguchi, Hitoaki Owashi, Hideo Nishijima, Hiroaki Ono, Hiroo Okamoto