Precision sensors for detecting the chemical compounds of explosives, narcotics, and other hazardous materials in air molecules, not for medical purposes; Precision sensors for detecting, measuring, recording, and transmitting readings of the chemical compounds of explosives, narcotics and other hazardous materials in air molecules;Apparatus for reading, recording, and transmitting human iris and facial characteristics in the nature of biometric retinal scanners, iris scanners, facial recogni...