Patents by Inventor Henricus Petrus Johannes Wijn

Henricus Petrus Johannes Wijn 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).

  • Magnetoresistance detection device having noise suppression
    Patent number: 4038597
    Abstract: A magnetoresistive detection device for determining the presence or absence of a single-wall magnetic domain at a position in a thin layer of magnetic material in which stable single-wall magnetic domains can be moved, comprising a sensing element of magnetoresistive material which is provided with respect to the layer of magnetic material in such manner that the resistance thereof varies when a single-wall magnetic domain is present at the said position. The device comprises means to produce an alternating magnetic field so as to modulate the size of a single-wall magnetic domain present at the said position, and comprises a filter which passes only interference-free terms of the signal detected by the sensing element.
    Type: Grant
    Filed: January 15, 1976
    Date of Patent: July 26, 1977
    Assignee: U.S. Philips Corporation
    Inventors: Frederik Willem Gorter, Henricus Petrus Johannes Wijn