http://www.worldpath.net/~hisaim/Bryson, metallurgist who specializes in the theory and practice of cryogenic and heat treatment of materials. Author of a technical book on each subject. Also provides cryogenic processing services and sales of cryogenic and heat treatment equipment. In Union, New Hampshire.Cryotechnology > Cryogenic Processing of Materials
Cryogenic treatment of all metal tooling, stamping dies, gun barrels, engine components, brass instruments. To make them more wear resistant. In Wooster, Ohio.
Cryogenic processing for racing and many industrial applications, including tools and firearms. In Chicago and Rockford, IL, Charlotte, NC, and Waltharn, MA.