EXTERMINATOR by HARRIS HOLDINGS, INC. (Track this)
Intl: (009) Electrical and scientific apparatus US: 021 Filing date: 04-May-1992 Serial number: 74272006
FBX FEEDBACK EXTERMINATOR by CLEARONE, INC. (Track this)
Intl: (009) Electrical and scientific apparatus US: 021 Filing date: 30-May-1990 Serial number: 74064135
XTERMINATOR by MONSTER, INC. (Track this)
Intl: (009) Electrical and scientific apparatus US: 021 Filing date: 23-Sep-1982 Serial number: 73387911