Asserter Category	Appeal Filed by Accused Infringer	Appeal Filed by Patent Asserter	Total	Percentage of Appeals That Were Filed by Accused Infringer
1. Acquired patents	32	255	287	11.1%
4. Corporate heritage	2	19	21	9.5%
5. Individual-inventor- started company	15	147	162	9.3%
6. University/Government/ Non-profit	11	22	33	33.3%
8. Product company	173	408	581	29.8%
9. Individual	10	67	77	13.0%
12. IP subsidiary of product company	9	24	33	27.3%