Water purification with silver

Looks as though someone stole Reid Harvey's idea of using clay pots and 
embedded silver for purifying water.

http://news.google.com/news?hl=en&ncl=http://www.thebatt.com/news/2007/10/03/News/Purifying.Water.Through.Pottery-3007263.shtml
I

Trem 
www.silvergen.com