INTERLOCK by AVDEL UK LIMITED (Track this)
Intl: (006) Metal goods US: 013 Filing date: 19-Dec-1988 Serial number: 73770131
GUARDIAN INTERLOCK by Guardian Technologies, Inc. (Track this)
Intl: (009) Electrical and scientific apparatus US: 026 Filing date: 13-Jan-1986 Serial number: 73577383
DOUBLE INTERLOCK by DODGE INDUSTRIAL, INC. (Track this)
Intl: (007) Machinery US: 023 Filing date: 05-Jul-1947 Serial number: 71526992