Patents by Inventor Arnold Broese Van Groenou

Arnold Broese Van Groenou 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 head having a wear-resistant layer, and method of manufacturing such a magnetic head
    Patent number: 6424489
    Abstract: Magnetic head having a head face (5) and comprising a head structure composed of thin layers and provided with a transducing element (E11), in which different materials occurring in different areas are present in the head face. The head face is provided with a first layer (31) of a material which is more sensitive to corrosion than other materials in the head face, and the first layer is provided with a second layer (33) of a wear-resistant material which is more insensitive to corrosion than the material of the first layer. The second layer constitutes a contact face (35) for cooperation with a magnetic tape (7).
    Type: Grant
    Filed: July 31, 1996
    Date of Patent: July 23, 2002
    Assignee: U.S. Philips Corporation
    Inventors: Franciscus W. A. Dirne, Victor Zieren, Arnold Broese Van Groenou, Leo-Franciscus M. Van Oorschot, Peter Lasinski, Mathijs De Jongh, Freddy Roozeboom
  • Magnetic head having a wear-resistant layer, and method of manufacturing such a magnetic head
    Publication number: 20020048114
    Abstract: Magnetic head having a head face (5) and comprising a head structure composed of thin layers and provided with a transducing element (E11), in which different materials occurring in different areas are present in the head face. The head face is provided with a first layer (31) of a material which is more sensitive to corrosion than said materials in the head face, and the first layer is provided with a second layer (33) of a wear-resistant material which is more insensitive to corrosion than the material of the first layer. The second layer constitutes a contact face (35) for cooperation with a magnetic tape (7).
    Type: Application
    Filed: November 30, 2001
    Publication date: April 25, 2002
    Applicant: U.S. Philips Corporation
    Inventors: Franciscus W.A. Dirne, Victor Zieren, Arnold Broese Van Groenou, Leo-Franciscus M. Van Oorschot, Peter Lasinski, Mathijs De Jongh, Freddy Roozeboom
  • Magnetic head having a wear resistant layer substantially comprising Cr.sub. O.sub.3 and method of manufacturing such a magnetic head
    Patent number: 5896253
    Abstract: A magnetic head having a head face (5) and a layer structure with a transducing element (E11) and a transducing gap terminating in the head face. At the area of the transducing gap and at both sides of the transducing gap the head face is coated with a layer (31) substantially comprising Cr.sub.2 O.sub.3 for forming a contact face (33) for cooperation with a record carrier. The layer substantially comprising Cr.sub.2 O.sub.3 having a thickness in the range between 10 and 100 nm is preferably provided by reactive RF sputtering.
    Type: Grant
    Filed: August 13, 1996
    Date of Patent: April 20, 1999
    Assignee: U.S. Philips Corporation
    Inventors: Franciscus W. A. Dirne, Arnold Broese Van Groenou, Peter Lasinski, Leo-Franciscus M. Van Oorschot
  • Magnetic head with wear resistant layer having alignment mark, and magnetic head unit incorporating same
    Patent number: 5513057
    Abstract: Magnetic head unit comprising a magnetic head secured in a housing and having a magnetic head structure provided with a head face and at least one transducing gap terminating in the head face. A wear- resistant layer (31 ) having at least one alignment mark (35, 36, 37) occupying a defined position with respect to the transducing gap is provided on the head face.
    Type: Grant
    Filed: May 15, 1995
    Date of Patent: April 30, 1996
    Assignee: U.S. Philips Corporation
    Inventors: Victor Zieren, Jacobus J. M. Ruigrok, Mathijs De Jongh, Arnold Broese Van Groenou