A method of “reading” the result of an assay effected by concentrating a detectable material in a comparatively small zone of a carrier in the form of a strip, sheet or layer through the thickness of which electromagnetic radiation such as visible light is transmissible, wherein at least a portion...http://www.google.ca/patents/US7141212?utm_source=gb-gplus-sharePatent US7141212 - Reading devices and assay devices for use therewith
