Key management scheme for use with electronic cards | Patent Number 05513261

US 05513261 NA
Application Number8175027
Publication Number-
Pendency2 years, 4 months, 3 days
Filled DateDec 29, 1993
Priority DateDec 29, 1993
Publication Date-
Expiration DateDec 29, 2013
Inventor/Applicants David P. Maher
ExaminesBARRON JR, GILBERTO
Art Unit2202
Technology Center2200
Assignments
At&t Company
Current
At&t ServicesAt&t Company
Original
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