Som eidylon noterade, var insignierna inte en Lore sak - det uppträdde först i "Q, Who", designad av Rick Sternbach.
The insignia appears at about 35:00 in the episode, to the left of Commander Riker as the away team walks into the Borg nursery. (source: Wiki)
TNG-handelskortet1992( Inaugural Edition 82-A ) har ett kort för Borg insignia med följande beskrivning,
"Resembling a great red claw over a background of circuitry, the symbol of the Borg is as mysterious as the race it represents. The Borg symbol may possibly define an amalgam of living tissue with computer circuits, as the Borg are believed to be a race of cybernetic organisms..."