[e2e] patents on routing algorithms

[Joe Touch]

David P. Reed wrote:
> A student just mentioned to me that AODV and OLSR routing algorithms are
> patented.  I have to say I was surprised.   Anyone know by whom, and
> what the licensing requirements are?
> 
> Are there also patents on any end-to-end protocols described by RFCs?

See: https://datatracker.ietf.org/ipr/

OSPF, in particular, has IBM IPR claims. Many are of the form "don't
enforce against us, and you can use this one for free"; something of
that general flexibility is typically the most restrictive accepted for
standards-track protocols.

Joe

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