Private company

Automatic Telephone Manufacturing Company

The Automatic Telephone and Electric Company (originally the Automatic Telephone Manufacturing Company (ATM)) was a British telephone exchange manufacturer established in 1911. After several name changes and acquisitions, the company was merged into Plessey in 1961.2 Wikipedia text CC BY-SA 4.0

Last updated Oct 21, 2026.

Overview

1911Founded1
  • Industrytelecommunications1

The Automatic Telephone and Electric Company (originally the Automatic Telephone Manufacturing Company (ATM)) was a British telephone exchange manufacturer established in 1911. After several name changes and acquisitions, the company was merged into Plessey in 1961.2

Timeline

  1. 1961Dissolved Dissolved1
  2. 1911Founded Founded1

Sources

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