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by Ladislav Tvaruzek
Sat Feb 09, 2013 7:21 pm
Forum: PATSTAT Product Line
Topic: Climate change patents by country and priority date
Replies: 0
Views: 1719

Climate change patents by country and priority date

Dear PATSTAT users I would like to ask you for an advice. I'd like to count the number of patents in Y02 ECLA category ("climate change patents") by country of invention and earliest priority date (1990-2010), filed in EPO only. I tried to use the following query but I'm far from confident of its co...