> Нет, GPL2 этого не требует, не путайте с GPL3.

Не-а.

$ grep -i patent </usr/share/common-licenses/GPL-2
patents.  We wish to avoid the danger that redistributors of a free
program will individually obtain patent licenses, in effect making the
patent must be licensed for everyone's free use or not licensed at all.
  7. If, as a consequence of a court judgment or allegation of patent
infringement or for any other reason (not limited to patent issues),
may not distribute the Program at all.  For example, if a patent
patents or other property right claims or to contest validity of any
certain countries either by patents or by copyrighted interfaces, the
$ _