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App. No. 09/976,721 · Confirmation No. 2477

SYSTEM FOR ENABLING TDD COMMUNCIATION IN A TELEPHONE NETWORK AND METHOD FOR USING SAME

Patent Expired Due to NonPayment of Maintenance Fees Under 37 CFR 1.362 View Patent ↗ View Publication ↗
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2015-02-09 OATH Oath or Declaration filed 148 View
2004-05-28 IFEE Issue Fee Payment (PTO-85B) 1 View
2004-05-28 LET. Miscellaneous Incoming Letter 4 View
2004-05-28 DRW Drawings-only black and white line drawings 4 View
2002-02-13 TRNA Transmittal of New Application 4 View
2002-02-13 DRW Drawings-only black and white line drawings 7 View
2001-10-12 TRNA Transmittal of New Application 2 View
2001-10-12 SPEC Specification 16 View
2001-10-12 CLM Claims 3 View
2001-10-12 ABST Abstract 1 View
2001-10-12 DRW Drawings-only black and white line drawings 7 View
2001-10-12 OATH Oath or Declaration filed 4 View
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Quick Facts
App. No.
09/976,721
Filed
2001-10-12
Granted
2004-07-13
Pub. No.
US20030072420A1
Examiner
CHAN, WING F
Art Unit
2643
PTA
-117 days