- Todd-Wells arc-focal point system. USA. 1965. Built by Edwin M. Todd and Trent H. Wells, Jr.
- Todd-Wells stereotactic stand. Southgate, CA: Made for Codman and Shurtleff by Trent H. Wells, Jr., Mechanical Development Co. [n.d.]
- MR/CT Compatible arc-phantom target system. Burlington, MA: Radionics. 1987. Built by Eric R. Cosman, PhD, Theodore S. Roberts, MD & Trent H. Wells, Jr.. Known as the CRW System.