GRIP STRUT by COOPER B-LINE, INC. (Track this)
Intl: (006) Metal goods US: 012 Filing date: 05-Nov-1952 Serial number: 71637654
UNISTRUT by UNISTRUT INTERNATIONAL CORPORATION (Track this)
Intl: (006) Metal goods US: 012 Filing date: 11-Feb-1952 Serial number: 71624800