Method and Apparatus For Sampling Contaminants US Patent # 5,942,699
Method and Apparatus For Sampling Contaminants
Controlled substance detection and identification system US Patent # 7,088,435
Controlled substance detection and identification system
Mineral detection and content evaluation method US Patent # 6,753,957
Mineral detection and content evaluation method
Personal identification verification US Patent # 6,914,668
Personal identification verification and controlled substance detection and identification system