The info below is from the 'USTPO Assignments' link from the link you provided above. It contradicts your statement that this patent is now assigned to YA.
31649-413 Expand result Nov 21, 2013 NEOMEDIA TECHNOLOGIES, INC. 7581682 20050270358 3
ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS).
Assignee: NEOMEDIA TECHNOLOGIES, INC. Assignor: NEOMEDIA EUROPE GMBH
Correspondent:
ANTHONY R BARKUME 20 GATEWAY LANE MANORVILLE, NY 11949
First of 3 Assigned Properties
Patent 7581682 (Sep 1, 2009) IMAGE-RECORDING DEVICE, METHOD FOR RECORDING AN IMAGE THAT IS VISUALIZED ON A DISPLAY UNIT, ARRANGEMENT OF AN IMAGE-RECORDING DEVICE AND A DISPLAY UNIT, USE OF SAID IMAGE-RECORDING DEVICE, AND USE OF SAID ARRANGEMENT
Where do you see this patent has now been assigned to YA? I don't see that ever being the case for this patent you mentioned.