Looks like a chain link .. sorta like the ones on a bicycle, but obviously much larger. My bet is Muder is actually Master?
Unless this is the first-ever such chain part, I struggle to think what could possibly be new (novel) and non-obvious about it.
So they filed a patent application.
I'll bet they never got one! (At least, not for this.)
Sorry for posting three times, but I still think there is a chance it is from a bicycle. It looks identical to most of the ones I see, except for the fact it is brass (which is rare), and has a patent. Usually just one link has the patent, so there is a very small chance that specific link will fall off.
Actually, I just did some research and found a brass chain with the maker on every chain. They are quite rare though and seem like they are for modern performance bikes.
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It could be either one of these options, but I am leaning towards my first choice, the tag nailed into a product (like a chest or radio)
Here's a typical vintage steel chain.
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As much as it does look like a chain, if it's made of copper I might venture a guess that it was an electrical jumper, given that the company dealt with electronics. Possibly just a piece of the item that hada a patent pending, rather than itself being the actual improved part of the circuitry.... Which makes finding a match tougher. Assuming that it's from the Muter radio company, Leslie F. Muter seems to be who held the patents.
It's thickness is slightly less than a penny; the bike chain parts look to be a bit thicker. It's non-metallic and I scratched a bit of the surface. It has a pinkish hue. Copper maybe?
Sorry to keep posting on this..I'm new to detecting and I knew that I'd like the research/identification part just as much as the hunt itself. Thanks for all the responses.