Patents by Inventor Gregory A. Jirak

Gregory A. Jirak 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).

  • Patent number: 5201046
    Abstract: An improved database management system (DBMS) stores, retrieves and manipulates directed graph data structures in a relational database. Each directed graph data structure contains one or more records of data which are interconnected by pointers. Data is stored in the database in the form of two dimensional tables, also known as flat files. The improved DBMS defines a schema for each table in the database. The schema defines the name and data type of each column in a database table. In tables used to store directed graph data structures, at least one column will be defined as having a reference data type. Non-empty entries in that column are pointers to rows in a specified table. Directed graph data structures are stored in specified tables by storing each record of the directed graph in a distinct row of one of the specified tables, with references corresponding to interconnections between records being stored in reference data type columns.
    Type: Grant
    Filed: June 22, 1990
    Date of Patent: April 6, 1993
    Assignee: Xidak, Inc.
    Inventors: Robert N. Goldberg, Gregory A. Jirak