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Inventor
SCHMIDT RICHARD CARL
US
2 patents
Patents
2 patents
US6957058B2
Oct 18, 2005
Prepaid wireless telephone account regeneration in a wireless access protocol system
SBC TECHN RES INC
68 citations
95
US6487401B2
Nov 26, 2002
Prepaid wireless telephone account regeneration in a wireless access protocol system
SBC TECHN RES INC
116 citations
95