The next waistpatch uses the older "banksy" style monkey in the design which I assume gave birth to the RMC logo we still see today:
I will assume this to be 2003/2004. Its fair to say that you are very unlikely to find many pairs of RMC with patches like the above 2 examples outside of Asia. This was produced when RMC was made in very small numbers, its also unlikely you will ever see fakes of these, certainly Ive never encounted any.
EDIT: The above waistpatch was in fact the first style used prior to the plainer one at the start of the thread, thanks to TNT for the info.
Next up we have waistpatches which most will have seen in one form or another, both are very similar, the only difference being the "Red Monkey Compy" or "Red Monkey Company" wording at the top of the patch. I think the version with "Compy" came first, prob around 2004/2005. This is the style of waistpatch you will most likely see on fakes!!