Patents by Inventor Di Heng

Di Heng 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).

  • Medical personnel and patient communication indicator device
    Patent number: 5252075
    Abstract: An easy to operate communication device consisting of a lighted information screen which is made up of subunits of data segments that can be further selectively highlighted. This device actually consists of twin units of the above, one unit contains the questions and requests to be highlighted, while the second unit contains the responses and instructions.
    Type: Grant
    Filed: March 30, 1992
    Date of Patent: October 12, 1993
    Inventor: Di Heng