Patents by Inventor Daravuth Seng

Daravuth Seng 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).

  • Dual backout with magnetic servo tracks
    Publication number: 20030203240
    Abstract: A magnetic tape includes a substrate having disposed on opposite sides thereof a magnetic-layered recording surface and a non-recording surface containing a magnetic servo tracking pattern, the non-recording surface including two layers, an outer layer containing inorganic particles and an inner layer containing magnetic particles.
    Type: Application
    Filed: April 24, 2002
    Publication date: October 30, 2003
    Inventors: Daravuth Seng, Plamen Stoyanov, Lawrence G. Neumann
  • Multiple-layer backcoating for magnetic tape
    Patent number: 6558774
    Abstract: A magnetic tape comprises a substrate having on one side thereof a magnetic layer serving as a recording surface, and on the other side thereof at least two layers containing inorganic particles which serve as a non-recording surface, wherein said magnetic tape has a region on the side of the non-recording surface along the longitudinal direction of the tape in which a regular pattern for servo tracking having different optical properties from the other major region of the side of the non-recording surface is or can be formed. The layers on the non-recording surface are characterized in that the inorganic particles in the outermost layer are larger than the inorganic particles in the underlying layer(s).
    Type: Grant
    Filed: August 17, 1999
    Date of Patent: May 6, 2003
    Assignee: Quantum Corporation
    Inventors: George A. Saliba, Satya Mallick, Daravuth Seng, Geon Choe
  • Multiple-layer backcoating for magnetic tape
    Publication number: 20030059649
    Abstract: A magnetic tape comprises a substrate having on one side thereof a magnetic layer serving as a recording surface, and on the other side thereof at least two layers containing inorganic particles which serve as a non-recording surface, wherein said magnetic tape has a region on the side of the non-recording surface along the longitudinal direction of the tape in which a regular pattern for servo tracking having different optical properties from the other major region of the side of the non-recording surface is or can be formed. The layers on the non-recording surface are characterized in that the inorganic particles in the outermost layer are larger than the inorganic particles in the underlying layer(s).
    Type: Application
    Filed: August 16, 2002
    Publication date: March 27, 2003
    Applicant: Quantum Corporation, a California corporation
    Inventors: George A. Saliba, Satya Mallick, Daravuth Seng, Geon Choe