Click for homepage
Bell Labs
Bell Telephone Laboratories

Bell Telephone Laboratories (BTL), also known as Bell Labs, AT&T Bell Laboratories, Bell and Nokia Bell Labs, is an American research and scientific development company. The company was established in 1925 as a consolidation of Western Electric Research Laboratories and part of the engineering department of the American Telephone & Telegraph company (AT&T). At the time, the company shares were evenly divided between AT&T and Western Electric Company (WE) [1].

Over the years, Bell Labs has been known under a wide variety of names and has been owned by various parent companies, including AT&T and Lucent Technologies. Since 2016, Bell Labs is owned by the Finnish company Nokia, and is currently known as Nokia Bell Labs, with the logo:

Engineers and researchers of Bell Labs are responsible for many important developments and/or inventions, such as radio astronomy, the transistor, the laser, the charge-coupled device (CCD), the photovoltaic cell, the Unix operating system and the programming languages C and C++. During WWII, Bell labs developed the unbreakable telephony system SIGSALY for the Allied Forces.

Bell Labs equipment on this website
SIGSALY secure telephony system
Modular Connector or Registered jack (RJ)
Dutal-tone multi-frequency signalling (Touch-Tone)
  • Volta Laboratory
  • Volta Bureau
  • Alexander Graham Bell Laboratory
  • Bell Carriage House
  • Bell Laboratory
  • Bell Telephone Laboratories
  • Bell Telephone Labs
  • Bell Labs
  • AT&T Bell Laboratories
  • AT&T Bell Labs
  • Lucent Technologies, Bell Labs Innovations
  • Nokia Bell Labs
Parent companies
Over the years, Bell Labs has been owned by the following companies:

  • AT&T and Western Electric
  • AT&T
  • Lucent Technologies
  • Alcatel Lucent
  • Nokia
  1. Wikipedia, Bell Labs
    Retrieved October 2016.
Further information
Any links shown in red are currently unavailable. If you like the information on this website, why not make a donation?
Crypto Museum. Created: Sunday 30 October 2016. Last changed: Saturday, 29 April 2023 - 11:07 CET.
Click for homepage