IPC, an example
In this specific class (on a subgroup level) there are some 800 publications, mostly patent documents. All very relevant to one very specific technical field, in this case membrane cleaning with moveable bodies.
The specific subgroup B01D65/04 is one of the approximately 65 000 subgroups available for search. Each related to its own technical field, or to its own "box".
The classification of patent document adds incredible powerful additional information, which can provide inspiration in any field of technology, Make use of it, it is all freely available and provided by the European Patent Office. You will find the relevant link below.
Hendrik de Lange
Dutch and European Patent Attorney
+31 (0) 641 74 686
Link with information about the international classification system: https://www.epo.org/searching/essentials/classification/ipc-reform.html
Link to a keyword search mask in the classes of the IPC