Simple Search
Introduction
Simple search queries are straightforward; just enter the key information and press Enter or click the "Search" button to get relevant information.
The system tries to present the most valuable patent documents first, making it easier for you to find the most important and relevant content.
Welcome to join the official WeChat group (bottom right) for more help.
Special Notice
When querying by application (patent) number or publication (announcement) number, you can enter the number directly. You do not need to prefix with ZL or CN, nor include decimal points and subsequent data.
You can search multiple patent numbers at once, connected by OR, e.g., 201280022677 OR 201120263542 OR 201180027996.
Segmentation
The system will split keywords by default. For example, entering "diesel car engine" will split the keywords into: "diesel" "car" "engine", and during the search, it will find patents that contain diesel, car, and engine without restrictions on the distance or order of the words.
To search for keywords precisely, you can use "diesel engine", which will find patents that contain the words diesel and engine next to each other.
