U-141 - Scuttled on 2 May, 1945 in the Raederschleuse at Wilhelmshaven. Wreck broken up, date unknown.
For more info:
http://www.uboat.net/boats/u141.htm
U-556 - Sunk 27 June, 1941 in the North Atlantic south-west of Iceland, in position 60.24N, 20.00W, by depth charges from the British corvettes HMS Nasturtium, HMS Celandine and HMS Gladiolus. 5 dead and 41 survivors.
For more info:
http://www.uboat.net/boats/u556.htm