HW

Hannes Willisch

VR Von Roll: 1 patents #12 of 48Top 25%
Overall (All Time): #2,365,619 of 4,157,543Top 60%
2
Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
4317671 Process of composting refuse or refuse/sewage sludge mixtures by thermal retting — 1982-03-02
4192848 Device for preparation and hygienization of refuse or refuse-clarified sludge mixtures by means of composting — 1980-03-11