Logo of <a href="https://en.wikipedia.org/wiki/Bell_Labs" class="extiw" title="en:Bell Labs">Bell Labs</a>, d.b.a. AT&amp;T Bell Laboratories, between 1984 and 1995
Bell Labs
Own vectorization of <a href="//commons.wikimedia.org/wiki/File:Bell_Labs_logo,_1984-1995.png" title="File:Bell Labs logo, 1984-1995.png">File:Bell Labs logo, 1984-1995.png</a>, adapted from <a href="//commons.wikimedia.org/wiki/File:AT%26T_Paradyne_logo.svg" title="File:AT&amp;T Paradyne logo.svg">File:AT&amp;T Paradyne logo.svg</a>