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by sva_ 1934 days ago
I don't think you can really call them a knockoff. As far as I know, the HackRF has been designed as an opensource hardware[0], so I'd guess the designer intended it to be built by different entities.

[0] https://github.com/mossmann/hackrf/tree/master/hardware

  "This is a free hardware design; you can redistribute it and/or modify it under the terms of the GNU General Public License[..]"