Alphabetical directory
This page shows the keywords or groups of words with the names of classes of the International Patent Classification. Choosing keyword with the name of the class (for example, the word "aircraft" in the name of class B64), you can get information on patents, the IPC index which is appropriate class (patents indexes B64C 11/00, B64C 27/00, etc.).
This page shows the keywords or groups of words with the names of the subclasses of the International Classification for Industrial Designs (ICID). Choosing such as "BUDUVALNI MACHINE" (name keywords subclass 15.4), you can get information about patents, ICID index which is subclass appropriate.