Patent grant no good [LWN.net]

Patent grant no good

Posted May 26, 2005 16:13 UTC (Thu) by mjr (subscriber, #6979)
In reply to: Patent grant no good by MathFox
Parent article: A toy and a promise from Nokia

But it also covers the "we didn't intend to license that" code; reworking allready distributed code is like bolting the stable door when the horse is gone.

Mainly I was concerned that they might be able to claim that they didn't know about some bit of code being in the kernel while distributing it and wouldn't have done it had they known, ie. pull an SCO. Not that SCO's doing a good job at pulling an SCO...

IANAL either, but lawyers told me that the GPL implicit patent license is pretty solid.

This is a nice tidbit, and alleviates my concerns a bit (as far as they relate to code being distributed by patent holders). Thanks for sharing. May I enquire in which country this was, and did they comment on how things are likely to be internationally (and have they got expertise on that)?

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Patent grant no good

Posted May 27, 2005 15:35 UTC (Fri) by giraffedata (subscriber, #1954) [Link]

There is no implied patent license. I've seen the FSF's explanation of the patent ramifications of GPL, and it consists mainly of Section 0. But Section 0 is a scope clause. It says what things the license (along with its conditions) does and doesn't restrict. One thing it doesn't restrict is how you can use the program. That's a far cry from affirmatively giving you the right to use the program unrestricted. The clause is, "Activities other than copying, distribution and modification are not covered by this License; they are outside its scope. The act of running the Program is not restricted, ..."

FSF also has a complicated explanation of how a not-freely-licensed patent might conflict with GPL by requiring the licensee to place restrictions on modifying the program. I agree that a patent license might conflict with the GPL. But others do not, and no license at all definitely does not.

For the sake of the next argument, lets imagine that there's another section in GPL that says, "I permit you to use the program in any way you please."

That still wouldn't effect an implied patent license from redistributors. Nokia could (in various ways) nullify that clause in its redistribution. The only effect would be that Nokia would be redistributing without a license, and that means Nokia would owe damages, including royalties, to the copyright owners. That's not the same thing as the recipient of the code from Nokia having a legal right to use Nokia's patents. The recipient still owes Nokia for patent infringement.