Add PatentsView (#2489)

README.md

@@ -1080,6 +1080,7 @@ API | Description | Auth | HTTPS | CORS |
 API | Description | Auth | HTTPS | CORS |
 |---|---|---|---|---|
 | [EPO](https://developers.epo.org/) | European patent search system api | `OAuth` | Yes | Unknown |
+| [PatentsView ](https://patentsview.org/apis/purpose) | API is intended to explore and visualize trends/patterns across the US innovation landscape | No | Yes | Unknown |
 | [TIPO](https://tiponet.tipo.gov.tw/Gazette/OpenData/OD/OD05.aspx?QryDS=API00) | Taiwan patent search system api | `apiKey` | Yes | Unknown |
 | [USPTO](https://www.uspto.gov/learning-and-resources/open-data-and-mobility) | USA patent api services | No | Yes | Unknown |