Patents by Inventor Hideki D. Izumi

Hideki D. Izumi 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).

  • Cartridge programming system and method using a central and local program library
    Patent number: 4725977
    Abstract: A cartridge programming system is provided for loading selected computer programs into a reprogrammable plug-in cartridge memory. A host computer controls a plurality of remote programming terminals. The terminals contain a library of programs. The consumer can select one and have it loaded into a blank cartridge. The terminal verifies the integrity of the copy and records the transaction. The host can send new programs to the terminals via dial-up telephone lines in response to the selection of a program not present in a particular terminal program library or in order to update the library of programs at each terminal and can request data on copying-transactions. Various security measures help assure accurate accounting of copies made, thereby assuring authors and their assignees that proper royalties can be billed.
    Type: Grant
    Filed: February 28, 1986
    Date of Patent: February 16, 1988
    Assignee: CPT, Ltd.
    Inventors: Hideki D. Izumi, Devender R. Beravol
  • Reprogrammable cartridge memory with built-in identification circuitry and programming method
    Patent number: 4680731
    Abstract: A reprogrammable plug-in semiconductor memory cartridge for use in a personal computer system, the cartridge being reprogrammed without removing the circuitry from the cartridge. The cartridge uses a keying-locking circuitry, such as a resistor-capacitor circuit having a unique time constant which must be detected by a cartridge programming system before allowing the programming operation to start. Thus access to a programming system program library is limited only to cartridges having the above-mentioned keying-locking circuitry. A cartridge retailer maintains a master program library and a limited number of such blank cartridges rather than maintaining a large inventory of programmed cartridges.
    Type: Grant
    Filed: May 19, 1986
    Date of Patent: July 14, 1987
    Assignee: Romox Incorporated
    Inventors: Hideki D. Izumi, Paul J. Terrell
  • Cartridge programming system
    Patent number: 4597058
    Abstract: A cartridge programming system is provided for loading selected computer programs into a reprogrammable plug-in cartridge memory. A host computer controls a plurality of remote programming terminals. The terminals contain a library of programs. The consumer can select one and have it loaded into a blank cartridge. The terminal verifies the integrity of the copy and records the transaction. The host can send new programs to the terminals via dial-up telephone lines and can request data on copying-transactions. Various security measures help assure accurate accounting of copies made, thereby assuring authors and their assignees that proper royalties can be billed.
    Type: Grant
    Filed: June 3, 1983
    Date of Patent: June 24, 1986
    Assignee: Romox, Inc.
    Inventors: Hideki D. Izumi, Devender R. Beravol