Shockley Semiconductor Laboratory markers (Mountain View, California)

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There are two historic marker outside the building.

A painted metal sign visible to car traffic (both ways) that says:
SITE OF
FIRST SILICON DEVICE AND
RESEARCH MANUFACTURING
COMPANY IN SILICON VALLEY.
THE RESEARCH CONDUCTED
HERE LED TO THE DEVELOPMENT
OF THE SILICON VALLEY, 1956

There is also a bronze plaque in the sidewalk at the entrance to this building:

Shockley Semiconductor Laboratory

This site, 391 South San Antonio Road, is the former location
of the Shockley Semiconductor Laboratory. At this location in
1956, De William Shockley started the first silicon devices
research and manufacturing company in the valley. The
individuals that gathered to work at this site went on to form
the pioneering Silicon Valley startup company Fairchild
Semiconductor Corporation and invent the first practicable
integrated circuit. The advanced reserach and ideas
developed here led to the development of Silicon Valley and
later breakthroughs in the computer industry.

www.paloaltohistory.com/william-shockley.php