international classification of goods and services WIPO
Proposals for changes in the Classification may be made by the competent Office .. goods of common metal not included in other classes; ores ... thereof), enabling customers to conveniently view and purchase those goods; .. Z 0002 Zinc.
Hazards of heavy metal contamination . British Medical Bulletin .
Dec 1, 2003 . British Medical Bulletin, Volume 68, Issue 1, 1 December 2003, Pages . have been made that mercury from amalgam may cause a variety of diseases. .. Cadmium occurs naturally in ores together with zinc, lead and copper. .. Therefore, a classification of cadmium as 'probably carcinogenic to humans'.Get Price