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Environmental Engineering and Energy Technology: Patents

The port to scientific electronic resources (e.g. e-journals, e-books, databases) on environmental engineering and energy technology


Patent classifications

The patent classification is a way of defining the technical field of an invention. The classification allows you to restrict your search to a particular technical field and to keep the number of search results at reasonable level (PRH, 2016).

Commonly used patent classificatios are:

Country- and kind codes

National patent offices: Websites and databases

WON list includes websites and patent databases of all countries' patent offices.

Some examples of national patent offices' websites and databases: