75645987
Feb 19, 1999
Jul 4, 2000
Surface plates, machine bases, machine assembly components, namely, Z shafts, X beams, Y beams, air bearings, bridges, risers, rails, columns, and stands made out of granite, diabase, marble and other natural and artificial stone products, which are precision manufactured to a uniformly flat surface for use in measuring devices, electronic instrumentation, and other scientific devices and applications requiring a uniformly flat surface to precise tolerances
Nonmetallic Building Materials