1 Subjects: “...Patent Statistics...”

2 Subjects: “...patent law...”

3 Subjects: “...mechanical patent classification...”

4 Subjects: “...; graphic arts; history; intellectual property; law; lithographs; nineteenth century; paintings; patents...”

5 Subjects: “...patent family...”

6 Subjects: “...global patent data...”

7 Subjects: “...patent analysis...”

8 Subjects: “...systematic and replicable patent analysis method...”