Patents by Inventor John Yen Ching

John Yen Ching 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).

  • Knowledge-based information retrieval system
    Patent number: 5822743
    Abstract: A method and system for assisting a user in solving a new problem case within a selected domain, such as a complex apparatus.
    Type: Grant
    Filed: April 8, 1997
    Date of Patent: October 13, 1998
    Assignee: 1215627 Ontario Inc.
    Inventors: Kalyan Moy Gupta, Alan Mark Langley, John Yen Ching