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>Most designs were made by very smart people in the 50s at RCA as far as I can tell.

I am very interested to know this. Do you have any resources on this development work done by RCA and how it has shaped the modern world?

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When I was looking at catalogs of various analog circuit designs, a lot of them were circuits RCA patented that now are public domain because the patents are now expired. They probably aren't the only ones, but they certainly contributed a lot.

https://patents.google.com/?q=(analog+circuit)&assignee=rca&...

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