Patents by Inventor Robert Melvin Sandfort

Robert Melvin Sandfort 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).

  • Method of fabricating magnetic bubble circuits
    Patent number: 4104422
    Abstract: In a bubble chip, increased spacing between a circuit overlay and a sheet of magnetic bubble material is provided at selected locations for particular circuit elements from which bubbles are to be deflected by magnetic repulsion. Differential spacing is achieved in one embodiment by means of a stratified spacing layer composed of the conventional nonmagnetic spacing layer plus a layer of nonmagnetic metal etched to form a mesa pattern which may include electrical control leads where necessary.
    Type: Grant
    Filed: June 2, 1975
    Date of Patent: August 1, 1978
    Assignee: Monsanto Company
    Inventor: Robert Melvin Sandfort