Software implementing patented techniques

Hello,

[Please keep me in CC, I am not subscribed]

A package I am interested in, Olaf (ITP #1127469), contains the 
following paragraph in its README (emphasis original):

Please be aware of the patents US7627477 B2 and US6990453 and perhaps 
others. They describe techniques used in algorithms implemented within 
Olaf. These patents limit the use of Olaf under various conditions and 
for several regions. Please make sure to consult your intellectual 
property rights specialist if you are in doubt about these restrictions. 
If these restrictions apply, please **respect the patent holders 
rights**. The main aim of Olaf is to serve as a learning platform on 
efficient (embedded) acoustic fingerprinting algorithms.

The code itself is licensed under AGPL-3+. Are such claims suitable for 
inclusion into main? I have never encountered anything like this in 
F/LOSS before.

Best wishes,
Andrius