Thu, 08/04/2016 - 13:07
Whether they’re made of leather or metal, tape measures have been used by people for a long time. The first spring-loaded metal tape measure was invented and patented in England in 1829. Alvin Fellows of New Haven, Connecticut, made improvements to…
Dan Sawyer
Leader and mechanical engineer
NIST
Dan Sawyer is the leader of and a mechanical engineer in the Dimensional Metrology Group in the Engineering Physics Division of the Physical Measurement Laboratory (PML) at the National Institute of Standards and Technology (NIST).
Thu, 08/04/2016 - 13:07