Patents by Inventor Babak H. Khalaj

Babak H. Khalaj 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).

  • Single ended line probing in DSL system
    Publication number: 20040062361
    Abstract: Single ended line probing techniques for determining if a telephone line qualifies for digital subscriber line service are disclosed.
    Type: Application
    Filed: October 2, 2003
    Publication date: April 1, 2004
    Inventors: Jalil Kamali, Babak H. Khalaj
  • Single ended line probing in DSL system
    Patent number: 6668041
    Abstract: Single ended line probing techniques for determining if a telephone line qualifies for digital subscriber line service are disclosed.
    Type: Grant
    Filed: May 9, 2001
    Date of Patent: December 23, 2003
    Assignee: Centillium Communications, Inc.
    Inventors: Jalil Kamali, Babak H. Khalaj
  • Single ended line probing in DSL system
    Publication number: 20030026391
    Abstract: Single ended line probing techniques for determining if a telephone line qualifies for digital subscriber line service are disclosed.
    Type: Application
    Filed: May 9, 2001
    Publication date: February 6, 2003
    Inventors: Jalil Kamali, Babak H. Khalaj
  • Automated direct patterned wafer inspection
    Patent number: 5513275
    Abstract: Disclosed is a new self-reference signal processing technique for detecting the location of any nonregularities and defects in a periodic two-dimensional signal or image. Using high-resolution spectral estimation algorithms, the proposed technique first extracts the period and structure of repeated patterns from the image to sub-pixel resolution in both directions, and then produces a defect-free reference image for making comparison with the actual image. Since the technique acquires all its needed information from a single image, on the contrary to the existing methods, there is no need for a database image, a scaling procedure, or any apriori knowledge about the repetition period of the patterns.
    Type: Grant
    Filed: June 9, 1994
    Date of Patent: April 30, 1996
    Assignee: Board of Trustees of the Leland Stanford Junior University
    Inventors: Babak H. Khalaj, Hamid K. Aghajan, Thomas Kailath