ALEXANDRIA, Va., May 27 -- American Science and Engineering, Billerica, Massachusetts, has been assigned a patent (9,658,343) developed by eight co-inventors for the "spectral discrimination using wavelength-shifting fiber-coupled scintillation detectors." The co-inventors are Anatoli Arodzero, Billerica, Massachusetts, Joseph Callerame, Lexington, Massachusetts, Dan-Christian Dinca, Chelmsford, Massachusetts, Rajen Sud, Burlington, Massachusetts, Lee Grodzins, Lexington, Massachusetts, Martin R . . .