Mine was Lucent Technologies. The plant I was at, Columbus Works, went from 5000 to about 200 to none in 2008 when the last stuff was moved to Richardson. The front offices were taken over by a local hospital system as admin offices, and the factory was torn down in 2014. There was a Bell Labs outpost next door, that's now generic office space.
That was a fascinating place, everything from modern manufacturing to people using pneumatic tape drive wirewrappers.
We had a Lucent Technologies outpost facility that popped up around the mid-late 1990s about a half mile from our facility. They poached a few engineers from us including one guy that I had bought a 15" Grizzly wood planer from. I'm not sure exactly what their function was, customer design-in or new product design. Then they later became Agere Systems IIRC and I've lost track after that. I remember their stock was rising with the tide in the late 1990s before the market crash.
Moved to Richardson TX? Cyrix was located in Richardson, I spent a few weeks there in the late 1990s.
LSI bought out Agere Systems in 2007. I think it's under the Broadcom name now.
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