German Patent Classification

published between 1906 and 1958

en-GB/ˈd͡ʒɜːmən ˈpeɪtnt ˌklæsɪfɪˈkeɪʃən/
en-US/ˈd͡ʒɝmən ˈpætənt ˌklæsəfəˈkeɪʃən/

Danh mục:

patent classification