Deeper into patstat ipcs in september 2010 data

Two issues with IPCs 
First of all a new group of IPC code arised: 

G01Q

we have  73195 in all patstat, but still we have no reclassification (OST30 or NACE) for them


See as example: EP 2250533
Soon we will try to suggest a possible cathegory for this IPC.

On the other hand we must highlight some IPC, falling under ipc_class_level 'S' are present in sept. 2009 data aside Advanced and Core IPCs. EPO suggestion is to drop them (they are about 1.2 Millions)

'A', 160.067.275
'C', 140.155.212
'S',   1.294.288