bar code magic

How do manufacturers use original/unique bar codes…Say I have a new widget…a combination hair curler/flashlight…what bar code design do I put on the box, so it’s unique (assuming it has to be unique)?


Obviously the c in rap
is silent
Dwyer-Land

Until Nickrz gets around to removing this duplicate thread, just thought I’d let everyone know that the other responses thus far are at
http://www.straightdope.com/ubb/Forum3/HTML/003460.html