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AT & T CO

Overview
  • Total Patents
    70
About

AT & T CO has a total of 70 patent applications. Its first patent ever was published in 1984. It filed its patents most often in Republic of Korea, United States and China. Its main competitors in its focus markets telecommunications, digital networks and computer technology are AMERICAN TELEPHONE & TELEGRAPH, BELL NORTHERN RESEARCH LTD and AT & T BELL LAB.

Patent filings in countries

World map showing AT & T COs patent filings in countries
# Country Total Patents
#1 Republic of Korea 32
#2 United States 26
#3 China 11
#4 Taiwan 1

Patent filings per year

Chart showing AT & T COs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Lothrop John R 2
#2 Vanacore Vincent D 2
#3 Kariri Perid 1
#4 Oliner Joseph S 1
#5 Church Kenneth W 1
#6 Seefeldt Roger Lee 1
#7 Werner Jean-Jacques 1
#8 Charls Hawad Henny 1
#9 Ynongna Patrick P 1
#10 Guroa Teimoshii Suratsuto 1

Latest patents

Publication Filing date Title
CN1156359A Maintenance for optical network
CN1156365A Multiple layer star form passive optical network based on terminal unit remote interrogation
CN1156364A Network communication system with global event calendar information and main line distribution
CN1155198A Network equipment providing two-way wide-band communication and method thereof
KR960014225B1 Arrangement for dynamically identifying the assignment of a subscriber telephone loop connection at a serving terminal
US4953198A Public cordless telephone
US4933967A Automatically-effected move of a subscriber between electronic message service systems in a network
US4939752A Distributed timing recovery for a distributed communication system
US4943973A Spread-spectrum identification signal for communications system
US4935954A Automated message retrieval system
KR970005161B1 Method of fabricating a superconductive body and apparatus and systems comprising the body
US4939509A Data conferencing arrangement for stations having keyboards and displays, using a keyboard buffer and a screen buffer
US4663583A Automatically variable phase characteristic all-pass circuit
US4651103A Phase adjustment system
US4680786A Communication system for providing business communication features to cellular mobile telecommunication customers
US4677616A Flow control scheme for a switching network
US4663519A Wound coil products and manufacture thereof
US4644562A Combined cross polarization interference cancellation and intersymbol interference equalization for terrestrial digital radio systems
US4669113A Integrated network controller for a dynamic nonhierarchical routing switching network
US4658260A Telescoping multiband antenna