Dual-Licensing Situation

[Joseph Heenan]

Alexandre Oliva wrote:
> On Jun  7, 2008, Joseph Heenan <joseph at heenan.me.uk> wrote:
> 
>> Company A has developed and distributed some GPL software.
> 
>> Company B refuses to sell you any of their proprietary software if you
>> have used Company A's software.
> 
>> I can't see how company A & B being the same company can make it be
>> a GPL violation.
> 
> Maybe I'm misreading you, but it doesn't take much for separate
> actions that would be perfectly legal when performed independently to
> turn into a GPL violation if performed by the same company, or even
> under an agreement involving different companies.  Think MS-Novell and
> GPLv3, for one.  Think modifying or distributing code under GPLv3 and
> enforcing a patent on others who modify or distribute the same code.
> Think distributing code under GPLv2 and enforcing a patent on others
> who modify or distribute the same code.

Yes, fair point. I was only thinking of the GPLv2 to be honest, but as
you mention even that has the 'patent licensing' clause.

Joseph