Canada.
Brevet 2,226,022. Méthode et installation de compostage
sans odeur/Odor-free composting method and installation.
USA.
Brevet 6,237,303. Odor-free composting method and installation.
Europe.
Brevet 98 964 346.5. Méthode et installation de compostage
sans odeur/Odor-free composting method and installation/Geruchsfreie
kompostierungsverfahren und anlage
Australie.
Brevet 748727. Odor-free composting method and installation.