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AMERICAN TELEPHONE & TELEGRAPH

Overview
  • Total Patents
    14,346
About

AMERICAN TELEPHONE & TELEGRAPH has a total of 14,346 patent applications. Its first patent ever was published in 1899. It filed its patents most often in United States, Japan and Canada. Its main competitors in its focus markets telecommunications, digital networks and optics are AT & T BELL LAB, AT & T CO and PLESSEY OVERSEAS.

Patent filings per year

Chart showing AMERICAN TELEPHONE & TELEGRAPHs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Harry Nyquist 108
#2 Affel Herman A 104
#3 Lloyd Espenschied 98
#4 Toomey John F 72
#5 Green Estill I 56
#6 Arroyo Candido John 48
#7 Joseph Herman 48
#8 Demarest Charles S 45
#9 Ohl Russell S 44
#10 Holden William H T 43

Latest patents

Publication Filing date Title
CN1253441A Ordinary old style telephone service/grouping bridge
CA2178681A1 Low-crosstalk modular electrical connector assembly
KR950013373B1 Speech message suppling device and speech message reviving method
CA2154195A1 Wireless local radio link telecommunications apparatus
CA2153906A1 Apparatus and method for screening foreign incollect calls to domestic non-collect call telephone numbers to reduce fraud
CA2151073A1 Intelligent human interface system
JPH07326920A Antenna assembly for portable transceiver
CA2147670A1 An improved transimpedance amplifier circuit for use in an optical receiver
CA2147399A1 Feed structure for use in a wireless communication system
JPH07300595A Lubricating method for surface of object
CA2145921A1 Method and apparatus for executing a distributed algorithm or service on a simple network management protocol based computer network
JPH07283197A Formation of substrate with conductor made of metal
CA2145106A1 Intelligent Memory-Based Input/Output System
CA2144795A1 Audio visual dubbing system and method
CA2144253A1 System and Method of Generating Compressed Video Graphics Images
CA2143980A1 User display in speech recognition system
CA2143145A1 Determining Dynamic Properties of Programs
JPH07262005A Extended operand bypass system
CA2143076A1 Communication system for processing caller id information
CA2141144A1 Electronic game utilizing bio-signals