ecd722fb_t___Columns_Switched___Updated__GPLv3
[#] - [GPLv2] Finally, any free program is threatened constantly by software patents. We wish to avoid the danger that redistributors of a free program will individually obtain patent licenses, in effect making the program proprietary. To prevent this, we have made it clear that any patent must be licensed for everyone's free use or not licensed at all. [GPLv3] 
Finally, every program is threatened constantly by software patents. We wish to avoid the special danger that redistributors of a free program will individually obtain patent licenses, in effect making the program proprietary. To prevent this, the GPL makes it clear that any patent must be licensed for everyone's free use or not licensed at all.
Groklaw - At Your Request, the GPLv2-GPL3 Chart - Columns Switched - Updated
GPLv3