Patent Number: 6,748,356
Homayoon S.M. Beigi, ``Methods and apparatus for identifying unknown speakers using a hierarchical tree structure,'' Filed, June 7, 2000, Granted, June 8, 2004.

Patent Number: 6,684,186
Homayoon S.M. Beigi, ``Speaker recognition using a hierarchical speaker model tree,'' Filed, January 26, 1999, Granted, January 27, 2004.

Patent Number: 6,538,187
Homayoon S.M. Beigi, ``Method and System for Writing Common Music Notation (CMN) using a Digital Pen,'' Filed, January 5, 2001, Granted, March 25, 2003.

Patent Number: 6,421,645
Homayoon S.M. Beigi, Alain C.L. Trischler, and Mahesh Viswanathan, ``Methods and Apparatus for Concurrent Speech Recognition, Speaker Segmentation and Speaker Classification,'' Filed, June 30, 1999, Granted, July 16, 2002.

Patent Number: 6,345,252
Homayoon S.M. Beigi, Alain C.L. Trischler, and Mahesh Viswanathan, ``Methods and Apparatus for Retrieving Audio Information using Content and Speaker Information,'' Filed, April 9, 1999, Granted, February 5, 2002.

Patent Number: 6,253,179
Homayoon S.M. Beigi, Upendra V. Chaudhari, Stephane H. Maes, and Jeffrey S. Sorensen, ``Method and apparatus for multi-environment speaker verification,'' Filed, January 29, 1999, Granted, June 26, 2001.

Patent Number: 6,246,982
Homayoon S.M. Beigi, Stephane H. Maes, and Jeffrey S. Sorensen, ``Method for measuring distance between collections of distributions,'' Filed, January 26, 1999, Granted, June 12, 2001.

Patent Number: 6,219,640
Sankar Basu, Homayoon S.M. Beigi, Stephane Maes, Benoit Maison, Chalapathy Neti, Andrew Senior, ``Methods and Apparatus for Audio-Visual Speaker Recognition and Utterance Verification,'' Filed, August 6, 1999, Granted, April 17, 2001.

Patent Number: 5,787,197
Beigi, Homayoon Sadr Mohammad; Fujisaki, Tetsunosuke; Modlin, William David; Wenstrup, Kenneth Steven ``Post-processing error correction scheme using a dictionary for on-line handwriting recognition ,'' Filed, March 28, 1994, Granted, July 28, 1998.

Homayoon S.M. Beigi, ``Method and Apparatus for Aggressive Compression, Storage and verification of the Dynamics of Handwritten Signature Signals,'' US Patent Office Filing Date, June 28, 2006.

Homayoon S.M. Beigi and Stephane Maes, ``Speaker Verification Using an Index and a Relative Distance,'' Disclosure Number YO999-537, Rated File, May 4, 1999.

Homayoon S.M. Beigi and Mahesh Viswanathan, ``Tracking Multiple Speakers Using a Database of Enrolled Speakers,'' Disclosure Number YO999-0166, Rated File, March 10, 1999.

Homayoon S.M. Beigi, Upendra V. Chaudhari, Stephane H. Maes, and Jeffrey S. Sorensen ``Method and Apparatus for Multi-Environment Speaker Recognition,'' Disclosure Number YO998-397, Filed on Jan. 29, 1999.