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| US4524589 | 1 Dic 1981 | 25 Jun 1985 | Vepa Aktiengesellschaft | Apparatus for froth processing of lengths of material |
| US5092234 | 31 Ene 1991 | 3 Mar 1992 | | Rotating drum container crusher |
| US5601520 | 11 Jul 1994 | 11 Feb 1997 | Klockner-Humboldt-Deutz AG | Wear-resistant hard-surfacing for the rolls of high-pressure roll presses |
