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Re: [ARSCLIST] Repairing (or purchasing) a Uher
From: Patent Tactics, George Brock-Nannestad
Richard Hess wrote:
...........
> Burwen "patented" his noise-reduction filtering in the DNF-1201
> consumer device (and perhaps the pro devices as well) by grinding off
> the part numbers and using semi-obscure chips like quad opamps.
.............
----- Packburn did precisely the same. However, they had 2 or 3 US patents,
so you can read what is now in the public domain. The real trick is to use
multilayer circuit boards and small resistance values as bridges. And - for
those who really decide what's going on: Large Scale Integration.
Kind regards,
George