Patents by Inventor William Cordt Simpson

William Cordt Simpson 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).

  • Semiconductor device resistors having selected temperature coefficients
    Patent number: 4035757
    Abstract: Two conductors are in resistive contact in spaced apart relation with a body of semiconductor material, e.g., silicon of P type conductivity, which is relatively lightly doped at the areas of contact, the electrical resistance at the areas of contact decreasing with increasing temperature. In one embodiment, portions of the conductors contact spaced apart regions of the body which are relatively highly doped at the areas of contact, parallel paths for current having different resistance characteristics thus being provided through the body between the conductors.
    Type: Grant
    Filed: November 24, 1975
    Date of Patent: July 12, 1977
    Assignee: RCA Corporation
    Inventors: Willem Gerard Einthoven, William Cordt Simpson