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AT&T Company

159 Case(s) (Last 5 Years)
www.att.com

Patents Prosecuted

Application numberTitle of the patentIPCFiling DateDecision Date
8198800 Method of authenticating a terminal in a transaction execution system Feb 16, 1994 Dec 11, 1995
8198011 Optical fiber system and method for overcoming the effects of polarization gain anisotropy in a fiber amplifier Feb 16, 1994 Jan 1, 1996
8196602 Voltage controlled ring oscillator producing a sum output Feb 14, 1994 Jun 26, 1995
8196930 Method of fabricating a compound semiconductor device Feb 14, 1994 Apr 17, 1995
8191685 Adaptive spatial-temporal postprocessing for low bit-rate coded image sequences Feb 3, 1994 Apr 29, 1996
8183384 Kalanchoe plant named Tico Dark Orange Jan 17, 1994 Nov 28, 1994
8183384 Kalanchoe plant named Tico Dark Orange Jan 17, 1994 Nov 28, 1994
8183384 Apparatus and method for non-regular channel assignment in wireless communication networks Jan 12, 1994 Apr 3, 1995
8183384 Apparatus and method for non-regular channel assignment in wireless communication networks Jan 12, 1994 Apr 3, 1995
8177503 Article comprising a semiconductor laser that is non-degenerate with regard to polarization Jan 4, 1994 Feb 13, 1995
8176392 Median peak detector for controlling disk pickup head Dec 29, 1993 May 15, 1995
8176003 Method for providing call waiting service H04M Dec 29, 1993 Apr 29, 1996
8175468 Method of fabrication for electro-optical devices Dec 29, 1993 May 22, 1995
8175875 Apparatus and method for screening foreign incollect calls to domestic non-collect call telephone numbers to reduce fraud Dec 29, 1993 Nov 6, 1995
8175828 Acoustic analysis of gas mixtures Dec 29, 1993 Feb 27, 1995
8175709 Diode coupled CMOS logic design for quasi-static resistive dissipation with multi-output capability Dec 29, 1993 Jun 5, 1995
8174923 Quadrature modular with adaptive suppression of carrier leakage Dec 28, 1993 Mar 6, 1995
8175008 Method and apparatus to increase efficiency of systematic codes Dec 28, 1993 Jan 1, 1996
8175092 Telephone system with subscriber selected audio and image announcements Dec 28, 1993 Jun 17, 1996
8174927 Security system for terminating fraudulent telephone calls Dec 28, 1993 Oct 30, 1995
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