The mark consists of the service mark RADCO with the words "certification" and "listing" on a separate line below RADCO and below that, the words "testing" and "inspection"; there is an angled black line that sweeps underneath RADCO and curves around into two separate black areas; the middle black area includes the words "certification" and "listing" while the bottom black area includes the words "testing" and "inspection"; a bullet-point dot precedes the four words.