• Jeffrey Kreulen, James Rhodes, and W. S. Spangler. Method and system for analyzing unstructured text in data warehouse. No. 20050262039, 2005.
• Jeffrey Kreulen, Vikas Krishna, Dharmendra Modha, Scott Spangler, Ray Strong Searching databases that identifying group documents forming high-dimensional torus geometric k-means clustering, ranking, summarizing based on vector triplets. No. 6862586, 2005
• W. S. Spangler, and Reiner Kraft. Interactive process for recognition and evaluation of a partial search query and display of interactive results. No. 6862713, 2005.
• Bill Cody, Jeffrey Kreulen, Vikas Krishna, Justin Lessler, and W. S. Spangler Text explanation for on-line analytic processing events. No. 20040243561, 2004.
• W. S. Spangler, and D. S. Modha, Clustering hypertext with applications to WEB searching. No. 20040049503, 2004.
• Matthias Eichstaedt, Jeffrey Kreulen, Vikas Krishna, Scott Spangler, Ray Strong, Method and system for the routing of requests using an automated classification and profile matching in a networked environment. No. 6510431, 2003.
• Amy Chow, Jeffrey Kreulen, Justin Lessler, Larry Proctor, and W. S. Spangler, Method and system for knowledge repository exploration and visualization. No. 20030004932, 2003.
• Jeffrey Kreulen, Justin Lessler, Michael Sanchez, and W. S. Spangler, Method for automatically finding frequently asked questions in a helpdesk data set. No. 20030050908, 2003.
• Jeffrey Kreulen, Scott Spangler, and Ray Strong Method and system for automatic comparison of text classifications. No. 6397215, 2002
• Jeffrey Kreulen, Dharmendra Modha, Scott Spangler, Ray Strong, System and method for interactive classification and analysis of data. No. 6424971, 2002.
• Jeffrey Kreulen, and W. S. Spangler, Efficient storage mechanism for representing term occurrence in unstructured text documents. No. 20020165884, 2002.
• Jeffrey Kreulen, Karen Holland, and W. S. Spangler, Method and system for identifying relationships between text documents and structured variables pertaining to the text documents. No. 20020156810, 2002.
• Jeffrey Kreulen, Michael Lamb, and W. S. Spangler, Method and apparatus for discovering knowledge gaps between problems and solutions in text databases. No. 20020169783, 2002.
• W. S. Spangler, and D. S. Modha, Feature weighting in k-means clustering. No. 6952700, 2001.
• Dharmendra Mohda, David Martin, Scott Spangler, Shivakumar Vaithyanathan, Method and apparatus for cluster exploration and visualization. No. 6100901, 2000.