Patents by Inventor Makoto Aikawa

Makoto Aikawa 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).

  • Analog memory device and method for reading data stored therein
    Patent number: 6288934
    Abstract: A read-out circuit, includes a data detecting circuit which detects analog data of a selected memory cell; a data condition deciding circuit which decides whether or not the analog data detected by the data detecting circuit is in a normal range; and a controller which normalizes an output signal for the selected memory cell in accordance with the decision of the data condition deciding circuit.
    Type: Grant
    Filed: September 6, 2000
    Date of Patent: September 11, 2001
    Assignee: Oki Electric Industry Co., Ltd.
    Inventor: Makoto Aikawa
  • 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