75342246
Aug 18, 1997
Dec 1, 1998
cryogenic treatment of metal articles, namely, drill bits, end mills, granulators, progressive dies, press dies, hammermills, extruders, forging dies, slicers, circular slicers cutters, gears, hobs, crankshafts, bearings, shear blades, balance shafts, patterns, pistons, engines, transmissions, rocker levers, blocks, cams, cam followers, aircraft, brass musical instruments, and firearms
Treatment of Materials