USPC-IPC Correspondence

The USPC and IPC systems were harmonized using the concordance provided by ReedTech at http://patents.reedtech.com/classdata.php. In order to simplify the classification of patents, we compared all IPCs found in the OECD's database to the USPTO classes liked in ReedTech's concordance table and assigned them to the appropriate USPTO label. 2 columns, 183K lines, "|" delimited; the columns are:--USPC: the USPC--IPC: the IPCs that are found in our database that are equivalent to that USPC. If more than one IPC is equivalent, they are separated by a ",".<br>本数据集依托ReedTech提供的分类对应对照表（访问地址：http://patents.reedtech.com/classdata.php），完成美国专利分类系统（USPC）与国际专利分类系统（IPC）的协调统一。为简化专利分类流程，我们将经合组织（OECD）数据库中收录的全部国际专利分类号，与ReedTech分类对照表内关联的美国专利分类类目进行匹配，并为其分配对应的美国专利分类标签。本数据集共包含2列、183000条数据行，以竖线（|）作为分隔符，各列说明如下： --USPC：美国专利分类系统（USPC）分类号 --IPC：本数据库中收录的与该USPC等效的国际专利分类号。若存在多个等效IPC，以逗号（,）分隔。