Dayton Coating Technologies
- Offers vacuum hard coating for tool and die, aerospace, machine building, medical, electronics, and automotive industries, including coatings, research facility, test labs, and applications engineering support.
- http://www.webdct.com

Northeast Coating Technologies
- Specializes in PVD (physical vapor deposition) process for titanium nitride coating of molds, dies, cutting tools, and other substrates. Site incorporates detailed account of technology and its applications.
- http://www.northeastcoating.com