Electrical computers and digital processing systems: multicomput – Computer conferencing – Demand based messaging
Reexamination Certificate
2004-07-13
2008-10-28
Nguyen, Quang N. (Department: 2141)
Electrical computers and digital processing systems: multicomput
Computer conferencing
Demand based messaging
C709S203000, C709S219000, C709S224000, C709S238000
Reexamination Certificate
active
07444380
ABSTRACT:
System and method for delivery of an electronic message from a sender unknown to a recipient when such message comprises a sender code verified by recipient's electronic message handler, thereby eliminating delivery of unsolicited bulk messages. Dispensing sender codes per recipient addresses thwarts senders of unsolicited bulk messages. Dispensing sender codes upon successful response to a human response question further thwarts bulk senders. Sender code calculation according to periodically changing factors limits sender code utility to finite time periods.
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Fernandez & Associates LLP
Nguyen Quang N.
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