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Paper making and fiber liberation

Patent class list (only not empty are listed)

Deeper subclasses:

Class / Patent application numberDescriptionNumber of patent applications / Date published
162100000 PROCESSES AND PRODUCTS 905
162001000 PROCESSES OF CHEMICAL LIBERATION, RECOVERY OR PURIFICATION OF NATURAL CELLULOSE OR FIBROUS MATERIAL 380
162232000 APPARATUS 284

Patent applications in class Paper making and fiber liberation

Patent applications in all subclasses Paper making and fiber liberation