Patents by Inventor Ryuji Nagahama

Ryuji Nagahama 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).

  • Publication number: 20030196001
    Abstract: In order to realize work load reduction and cost reduction, there is provided a system that includes a bill data creating unit (5) for creating bill creation data composed of character strings, a digital bill creating unit (6) for creating a digital bill using the bill creation data, a digital signature unit (7) for creating digital signature data by performing digital signature processing on the created digital bill, and a bill electronic delivery unit (9) for combining the digital bill and the digital signature data and electronically delivering them. Among these construction elements, the digital bill creating unit (6) and the digital signature unit (7) are provided in a server (20) and the bill creation processing and the digital signature processing are automatically performed by the server (20) without the requirement for operations from an operator.
    Type: Application
    Filed: March 14, 2003
    Publication date: October 16, 2003
    Inventor: Ryuji Nagahama
  • Publication number: 20030196090
    Abstract: In the digital signature system, a server 1 is provided with a tamper resistant HSM 13 having stored therein a digital certificate 11, which is equivalent to an official seal, issued to an organization, a digital signature unit 17 for applying digital signature processing to digital data using the digital certificate 11, a person in charge database memory unit 22 having stored therein a database of a person in charge authorized to request digital signature, and a digital signature request reception unit 16 for receiving a request for digital signature sent from a terminal for person in charge together with the digital data 14 to be an object of digital signature and at the same time, judging whether or not the received request for digital signature is a request sent by a person in charge stored in the person in charge database memory unit 22.
    Type: Application
    Filed: March 6, 2003
    Publication date: October 16, 2003
    Inventor: Ryuji Nagahama