Exclude words from a search?

[Ulrich Sutter]

How can I exclude words from a search?
In the search mask there is only the parameter "AND" or "OR" listed. I tried to search with the "AND" parameter in connection with the operator "NOT + word" but it seems that it works not correctly.

[Sandrine]

The PATENTSCOPE search system supports ANDNOT. What is your query?