Table 1. 
Basic statistics on the Regpat data set
# patents 3,175,990 
# regions 5,520 
# countries 48 
# coinvented patents with inventors from different regions 1,171,993 
# coinvented patents with inventors from different regions that are also coassigned 112,915 
# patents 3,175,990 
# regions 5,520 
# countries 48 
# coinvented patents with inventors from different regions 1,171,993 
# coinvented patents with inventors from different regions that are also coassigned 112,915 
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