om different viewing directionsUS5590057Dec 20, 1993Dec 31, 1996Atlantic Richfield CompanyFor training and certifying a trainee to perform a taskUS5600303Jun 6, 1995Feb 4, 1997Technology International IncorporatedDetection of concealed explosives and contrabandUS5600700Sep 25, 1995Feb 4, 1997Vivid Technologies, Inc.Detecting explosives or other contraband by employing transmitted and scattered X-r