US 8620659

US Patent 8620659, titled "System and method of supporting adaptive misrecognition in conversational speech," was issued on December 31, 2013, from an application filed on February 7, 2011. The inventors are Philippe Di Cristo, Chris Weider, and Robert A. Kennewick. The original assignee was VoiceBox Technologies Corp, and the current assignee is Dialect LLC.

Abstract:
The patent describes a system and method for receiving natural language questions and commands via speech and/or non-speech communications and executing them. It features a conversational human-machine interface that incorporates a conversational speech analyzer, a general cognitive model, an environmental model, and a personalized cognitive model. These components work together to determine context, domain knowledge, and leverage prior information to interpret spoken utterances or received non-spoken messages. The system creates, stores, and utilizes extensive personal profile information for each user, which enhances the reliability of context determination for communications and improves the presentation of expected results for specific questions or commands.

Independent Claims Overview:
The full text of the independent claims for US8620659 is not available in the provided patent information. Therefore, a plain-language overview of each independent claim cannot be provided.

Litigation Information:
As of April 26, 2026, the patent 8620659 has been involved in several litigation actions:

• A PTAB (Patent Trial and Appeal Board) case, IPR2025-01352, was filed and subsequently settled.
• A US case was filed in the Texas Eastern District Court (case number 2:24-cv-01067).
• Another US case was filed in the California Northern District Court (case number 3:24-cv-04388).
• The first worldwide family litigation for this patent family was also filed, as indicated by Darts-ip.
  The patent's legal status is listed as "Expired - Fee Related," with an anticipated expiration date of August 10, 2025.

No specific dockets related to patent 8620659 were found in the CAFC 2026 scheduled cases through direct search.