The original patent documents in some countries are not in English, so they need to be translated into English when searching by invention name.
The publication date is the date when the patent was first published. It consists of eight numbers: year, month, day or day/month/year, and cannot be expressed in other ways. For example:
Correct: 2002 1 1 19 or11/2002, error: 2002-1-
The more conditions are defined, the more accurate the result will be. If there are fewer restrictions, there will be more results; Some fields (such as application number) have only one result.