[HamWAN PSDR] Encryption on HamWAN

[John D. Hays]

Yes, both were patented technologies.

Most every modern radio has a lot of licensed intellectual property, from
microprocessors to modulator circuits to displays ...



On Sun, Jul 28, 2019, 21:09 Nick Kartsioukas <nick at explodinglemur.org>
wrote:

>
> As for FM and SSB, I may be missing something in their history, was there
> a time when an amateur radio operator was legally prohibited from
> developing their own SSB or FM modulator or demodulator without paying a
> licensing fee to some entity?
>
>
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