Several SSIDs on one radio?

Ok I know this is not an MSDN newsgroup, but still hope that somebody here
can answer this question.

Suppose I makes a wireless router based on "open source" software, and
license it under GPL.
This router should have "virtual AP" : one physical radio has several
different visible SSIDs.
Are they allowed to use the WPS Information element, as documented in MSDN :
http://msdn2.microsoft.com/en-us/library/ms818947.aspx

Is this Information element owned by Micrososoft or Cisco?
What routers and access point on sale (besides Cisco's) that use this IE?

Thanks,
-- PA

[repost.. sorry hit send too fast ]

Ok I know this is not an MSDN newsgroup, but still hope that somebody here
can answer this question.

Suppose somebody makes a wireless router based on "open source" and to be
licensed under GPL.
This router should have "virtual AP" capability: one physical radio has
several
different visible SSIDs.
Are they allowed to use the WPS Information element, as documented in MSDN :
http://msdn2.microsoft.com/en-us/library/ms818947.aspx

Is this Information element owned by Microsoft or Cisco?
What routers and access point on sale (besides Cisco's) use this IE?

Thanks,
-- PA