Patents by Inventor Hans Logmans

Hans Logmans 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).

  • Magnetic structure
    Patent number: 4169189
    Abstract: A magnetic structure for the propagation of magnetic bubbles at elevated velocity. A magnetic bubble layer is grown on a [110] face of a substrate, the lattice misfit being between -6.times.10.sup.-3 and -2.times.10.sup.-3, and the magnetic layer having a composition on the basis of europium-iron garnet and a damping parameter .ltoreq.3.times.10.sup.-7 Oe.sup.2 sec/rad.
    Type: Grant
    Filed: June 27, 1977
    Date of Patent: September 25, 1979
    Assignee: U.S. Philips Corporation
    Inventors: William T. Stacy, Antonius B. Voermans, Hans Logmans
  • Magnetic structures
    Patent number: 4138530
    Abstract: A magnetic structure having a high magnetic bubble mobility which has the property that magnetic bubbles can be transported in it at very high velocities while using comparatively weak driving fields, comprising a substrate having a (110) oriented deposition surface on which a layer of rare earth -- iron garnet with a substitution of Mn.sup.3+ in iron lattice sites has been grown in compression in such a manner that the layer of rare earth-iron garnet has an orthorhombic anisotropy.
    Type: Grant
    Filed: June 27, 1977
    Date of Patent: February 6, 1979
    Assignee: U.S. Philips Corporation
    Inventors: Dirk J. Breed, Antonius B. Voermans, Hans Logmans