In the text of the license agreement Microsoft mentions two specific patents that relate to the CIFS/SMB protocol. The license grants a royalty free license to these patents, but specifically excludes free software distributed under the GNU General Public License from this royalty free patent license.
Some people have incorrectly assumed that Samba must implement the methods described in these patents. In fact, the methods described in these patents are quite inappropriate for a Unix/POSIX CIFS implementation such as Samba. It would not even be possible to implement the methods described in these patents in a portable POSIX application. Instead, Samba treats the SMBreadbraw and SMBwritebraw protocol elements in the same way as all other elements of the CIFS/SMB protocol. This means that as far as we are aware Samba is completely unaffected by the existence of these patents.
We would like to also point out that these patents cover an obsolete section of the CIFS/SMB protocol that Microsoft themselves have abandoned in their own products long ago. Microsoft abandoned these "raw" protocol operations in CIFS because their basic design is fatally flawed.
РЫБА, -ы; ж. 3. Разг. То, что подготовлено для кого-л. в качестве предварительного или необходимого материала; заготовка. Доклад ещё не готов, но р. уже есть.
Кстати, эта мысль устарела на 100 лет.