there is something about in return for receiving a patent, the patent-holder must then make the patented technology available at a reasonable cost.

If only. (I think you're confusing patents in general, with the W3C's abortive attempt to define "reasonable and non-discriminatory" patent licensing.)

The holder of a patent has absolute rights over it for the duration of the patent. The "return" is that the holder must disclose everything up front about how the patent works, so that once the patent expires anyone can duplicate the work.

Obviously this "return" is only worth anything if the invention described in the patent is still useful once the patent has expired; in other words, if the duration of the patent is shorter than the expected life of the technology.

ObOnTopic: I think it's fair to say that if an integer-only or ARM version of the Ogg Vorbis codec were released, there would be an internal development version incorporating it within 24 hours.

Peter