1. Levin, R.: A patent system for the 21st century. Issues Sci. Technol. 4(20), 49–54 (2004)
2. Whalen, R.: Complex innovation and the patent office. Chicago-Kent J. Intellect. Property 17(1), 226–278 (2018)
3. Wagner, R.P.: Understanding patent quality mechanisms. Univ. Pennsylvania Law Rev. 157, 2135 (2009)
4. Zhang, L., Li, L., Li, T.: Patent mining: a survey. ACM SIGKDD Explor. Newsl. 16, 1–19 (2014)
5. Wang, J., Lu, W.F., Loh, H.T.: A two-level parser for patent claim parsing. Adv. Eng. Inform. 29, 431–439 (2015)