In reference to the patent: US6506148
Who has rights to this patent?
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Unfortunately, in the USA, neither disclosure of assignment of ownership nor licensing of rights - exclusive or otherwise - are mandatory. Thus we are largely unable to answer your question definitively, as the inventor is still - according to the USPTO - the owner of record. The FAQ about how to find out what is known and how to proceed is here.
However, this patent and others by Loos have been the subject of extensive speculation, including the expected conspiracy theories.