CELTRON by Emerson Process Management Regulator Technologies, Inc. (Track this)
Intl: (006) Metal goods US: 013 Filing date: 19-Dec-1968 Serial number: 72314878
CHANNELTRON by PHOTONIS SCIENTIFIC, INC. (Track this)
Intl: (009) Electrical and scientific apparatus US: 026 Filing date: 06-Feb-1964 Serial number: 72186142