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Johannes W. M. Steeman

SB Stamicarbon B.V.: 2 patents #111 of 427Top 30%
📍 Geleen, NL: #137 of 342 inventorsTop 45%
Overall (All Time): #2,369,038 of 4,157,543Top 60%
2
Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
4245699 Method for in-situ recovery of methane from deeply buried coal seams — 1981-01-20
4220203 Method for recovering coal in situ — 1980-09-02