http://en.wikipedia.org/wiki/ECC_patents

tptacek · on June 25, 2012

http://cr.yp.to/patents.html

Patents used to be the reason ECC was rarely used (that and novelty), but there are ECC systems in somewhat wide use that aren't patent-licensed.

tedunangst · on June 25, 2012

Right. I mentioned it because any discussion of why something isn't used should mention why it wasn't used. "It's ok to use this" is more compelling if it explains why the observed reality differs. :)