Patents by Inventor Shogo Samejima

Shogo Samejima 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).

  • Emulation of semiconductor and magnetic auxiliary storage devices with semiconductor memory
    Patent number: 5437018
    Abstract: A compact, low power consumption, light weight, highly reliable and high speed information processing system is provided by employing a semiconductor auxiliary storage device in lieu of conventional magnetic storage or memory elements, such as floppy or hard disks. An access request to such a magnetic storage or memory element is converted to an access request for the semiconductor auxiliary storage which uses semiconductor integrated circuits without requiring any modification of existing programs, such as, application software and disk operating systems. A memory circuit in the semiconductor auxiliary storage comprises ROM and RAM, and a portion of the ROM contents is copied into the RAM so that access modification for programs and data is permitted while the basic program and data is retained in a nonvolatile manner.
    Type: Grant
    Filed: July 2, 1993
    Date of Patent: July 25, 1995
    Assignee: Seiko Epson Corporation
    Inventors: Junichi Kobayashi, Hiroaki Tateno, Masayuki Ikeda, Shogo Samejima
  • Semiconductor memory configured to emulate floppy and hard disk magnetic storage based upon a determined storage capacity of the semiconductor memory
    Patent number: 5226168
    Abstract: A compact, low power consumption, light weight, highly reliable and high speed information processing system is provided by employing a semiconductor auxiliary storage device in lieu of conventional magnetic storage or memory elements, such as floppy or hard disks. An access request to such a magnetic storage or memory element is converted to an access request for the semiconductor auxiliary storage which uses semiconductor integrated circuits without requiring any modification of existing programs, such as, application software and disk operating systems. A memory circuit in the semiconductor auxiliary storage comprises ROM and RAM, and a portion of the ROM contents is copied into the RAM so that access modification for programs and data is permitted while the basic program and data is retained in a nonvolatile manner.
    Type: Grant
    Filed: April 24, 1990
    Date of Patent: July 6, 1993
    Assignee: Seiko Epson Corporation
    Inventors: Junichi Kobayashi, Hiroaki Tateno, Masayuki Ikeda, Shogo Samejima