they executed the assignment of the 923 patent on Dec 6th. 2011... here is Calypso's patent assignment history...(click on the pat # column) http://assignments.uspto.gov/assignments/q?db=pat&qt=asnr&reel=&frame=&pat=&pub=&asnr=calypso+wireless&asnri=&asne=&asnei=&asns=