not too bust your balls orso but these rank combadges are used in as far as i recall only 1 or maybe 2 episodes the one that i am sure of is called "Future Imperfect" and isn't in the normal dimension these combadges are also referred too as TNG:Future Imperfect Combadges
on June 24th 2008
on October 23rd 2008
on July 23rd 2009