Method and means for preventing fraudulent use of telephone network | Patent Number 05495521

US 05495521 NA
Application Number8152993
Publication Number-
Pendency2 years, 3 months, 17 days
Filled DateNov 12, 1993
Priority DateNov 12, 1993
Publication Date-
Expiration DateNov 12, 2013
Inventor/Applicants Hemmige V. Rangachar
ExaminesHOMERE, JEAN RAYMOND
Art Unit2307
Technology Center2300
Assignments
At&t Company
Current
At&t ServicesAt&t Company
Original
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