I don't have much information about these patches, all I know that the brassart company made some metal patches (which were actually made from metal) back at the end of the '80's, the 4 holes in the corners are for the 4 spikes so it can easily be attached to your jacket (but these will stay in their plastics and not on any jacket or something so they won't wear, bend or anything
this is all the information I have of these patches, I anyone has more information about these Brassart patches, please tell me