Method and apparatus for detection and prevention of calling card fraud

Assignee

• Sprint Communications

Inventors

• Hooshmand Afsar (2 patents)
• David Scott Janzen (1 patents)
• Mark Ross Erickson (2 patents)
• Hazel Suzanne Shirley (1 patents)
• Christine Louise Fogarty (1 patents)
• Michael Scott Nielsen (5 patents)
• Douglas Clark (30 patents)

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