[smachiz]

Only for patents used in standards - where the standard enforces FRAND/RAND/other licensing schemes to insure that 'standards-required' patents are available to all. https://en.wikipedia.org/wiki/Reasonable_and_non-discriminat...

This is Qualcomm's big business (and others), getting their patents into standards like 5G and then charging people a fair amount to use it - and they have to license it to everyone, even their arch nemesis. Or you just buy their chips.

For a patent of something you invented, but did not submit to become part of a standards-body, you absolutely can choose not to license it for any amount of money.