Patents by Inventor Evan M. Rothfield

Evan M. Rothfield 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).

  • System for composing a graphical interface to a relational database which displays a network of query and source icons
    Patent number: 5428776
    Abstract: A Graphical Query Front End system for Querying a relational database displays the elements of a Query in graphical form. The graphical query consists of tables, shown as nodes on a display, used as input (i.e. connected) to operator nodes, which produce output tables by modifying the inputs based on information provided by the user. There are several operators, each of which represents a different piece of defining a query, e.g. selecting columns or selecting rows. These operator nodes may then be used as inputs to operator nodes which modify their inputs to produce output tables, and so on until the desired result is achieved.
    Type: Grant
    Filed: December 22, 1993
    Date of Patent: June 27, 1995
    Assignee: Wang Laboratories, Inc.
    Inventor: Evan M. Rothfield