Muela/Haller/Cudeman/Nieto History

[jgkelly]

I'm looking for some history on Muela, Haller, Cudeman and Nieto. I have collection of all sorts of these knives but can't find a good source of company history. I know Linder sells Cudeman. Are they the same company? I know that both Muela and Haller use the MM symbol, are they the same company? I see similarity between some of the Cudeman knives and some of the Nieto knives. Can anyone help me out? Thanks.