Most Municipalities require a sign to be UL listed. What does that mean? Underwriters Laboratories Inc. originated in 1894 by electrical engineer William Henry Merrill shortly after he visited the Palace of Electricity and the Chicago World's Fair.
Read MoreMost Municipalities require a sign to be UL listed. What does that mean? Underwriters Laboratories Inc. originated in 1894 by electrical engineer William Henry Merrill shortly after he visited the Palace of Electricity and the Chicago World's Fair.
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