IP Library › Patent Application 09786663
Patent Application Utility PCT National Stage
App. No. 09/786,663 · Confirmation No. 4035

METHOD FOR BACKING UP CALL CHARGE DATA OF A TELEPHONE SWITCHING OFFICE

Patent Expired Due to NonPayment of Maintenance Fees Under 37 CFR 1.362 View Patent ↗
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2004-11-09 IFEE Issue Fee Payment (PTO-85B) 2 View
2000-03-07 ABST Abstract 1 View
2000-03-07 LET. Miscellaneous Incoming Letter 18 View
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Quick Facts
App. No.
09/786,663
Filed
2001-03-07
Granted
2004-12-14
Art Unit
2643
PTA
0 days