Search clue: application number or submission number
Search Skills: Searching for Derwent patents of the same family in the DII patent database will merge the patents of the same family into one record, and different patent numbers granted by different countries to the same technology will be listed in the same record page, so that the global patent authorization of a specific patent can be seen at a glance. In addition, for non-English/Chinese patents, we can find English patents of the same technology and understand the technical details through the records of patents of the same subject. Searching for patent of the same family in Espacenet