A disposable pathogen barrier of a material which is highly elastic and stretchable, yet tear-resistant, and capable of being placed in proximate contact and covering an entirety of a variety of elongated, tubular-shaped intra-oral medical or dental tools or implements which emit lightwaves in pre-determined...http://www.google.com.au/patents/US6402511?utm_source=gb-gplus-sharePatent US6402511 - Pathogen barrier with optically transparent end
