Virtual challenge system and method for teaching a language

Assignee

• Microsoft

Inventors

• John P. Pella (3 patents)
• Quentin DeWolf (1 patents)
• Peter C. Acker (1 patents)
• Charles A. Hale (3 patents)
• Renée Louise April (2 patents)
• Jason T. Cortese (1 patents)
• Victor Bondi (1 patents)

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