JSON is part of the SQL 2016 standard and exists in other databases as well. I don't see how the trademark is relevant here.
I wish we could be more civil and not resort to petty insults. Is there anything I wrote you can dispute with a source?
I think Mariadb was there first. I think the format is very similar at the bit level, but the MySQL has nicer API with automatic returning it as text to apps rather than exposing the bits. I dislike json_extract and wish >> worked but it doesn't seem to on my percona server :(
Anyhow, you'll look back when you've got more distance from Oracle and realize that you don't need to try and convince yourself that MySQL was better quite so hard ;)