Patents by Inventor James Y. Wong

James Y. Wong 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).

  • Microwave leakage indicator strip
    Patent number: 4065655
    Abstract: A microwave leakage indicator for ovens in the form of a strip of encapsulated liquid crystal film backed by a layer of microwave absorbing material mounted around the edge of the door and overlapping the slot between door and oven where leakage might occur. The characteristics of the liquid crystal material are chosen such that if leakage above a preset level does occur at any location around the edge of the door, the absorbing material generates heat resulting in a quickly noticeable colour change in the liquid crystal film.
    Type: Grant
    Filed: May 17, 1976
    Date of Patent: December 27, 1977
    Assignee: Canadian Patents and Development Limited
    Inventors: James Y. Wong, Satish C. Kashyap, John G. Dunn