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

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

3 Subjects: “...patent law...”

4 Subjects: “...patent documents...”

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

6 Subjects: “...patented solutions...”

7 Subjects: “...patents...”

8 Subjects: “...patent analysis...”

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

10 Subjects: “...patent...”

11 Subjects: “...patent...”

12 Subjects: “...patenting...”