1. Dunn, J. E., Clark, R. W., Bushnell, A. H. & Salisbury, K. J. Deactivation of organisms using high intensity pulsed polychromatic light (US Patent 6,228,332 filed 26 Mar. 2001, and issued 11 Jul. 2002).
2. Schoenbach, K. H., Byszewski, W. W., Peterkin, F. E. & Dharamsi, A. N. Discharge device having cathode with micro hollow array (US Patent 6,346,770 filed 22 Mar. 2000, and issued 12 Feb. 2002).
3. Cooper, J. R. Ultraviolet Light Treatment Chamber (US Patent 7,511,281 filed 31 Aug. 2005, and issued 31 Mar. 2009).
4. Pirnie, M., Linden, K. G. & Malley, J. P. J. Ultraviolet disinfection guidance manual for the final long term 2 enhanced surface water treatment rule. US Environmental Protection Agency 1–436 (2006).
5. Maiden, M. & Watkins, R. Hand-held ultraviolet water purification system (US Patent 6,110,424 filed 23 Feb. 1999, and issued 29 Aug. 2000).