Patents by Inventor Theresa B. Stellwag

Theresa B. Stellwag 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).

  • Dynamic random access memory device
    Patent number: 5365477
    Abstract: A vertically integrated DRAM cell having a storage time of at least 4.5 hours at room temperature, formed from a wide-bandgap semiconductor such as GaAs or AlGaAs, in which an n-p-n bipolar access transistor is merged with a p-n-p storage capacitor, with the middle p-n layers being common to both. Similarly, a p-n-p transistor can be merged with an n-p-n storage capacitor.
    Type: Grant
    Filed: June 16, 1992
    Date of Patent: November 15, 1994
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: James A. Cooper, Jr., Michael R. Melloch, Theresa B. Stellwag