IP Library › Granted Patent US 6,404,871
Granted Patent Utility
US 6,404,871 · App. 09/464,135

Termination number screening

Inventors: Arthur Lance Springer, Dean C. Marchand
Patented Case View Patent ↗
Granted: Jun 11, 2002 Filed: Dec 16, 1999
Inventors
Arthur Lance Springer
Dean C. Marchand
Assignee (at issue)
MCI WorldCom. Inc.

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Quick Facts
Patent No.
US 6,404,871
App. No.
09/464,135
Filed
1999-12-16
Granted
2002-06-11
Kind
B1