DE2018168
SPIETSCHKA, ERNST., 6271 OBERAUROFF, REHBERG, ROLF, PAPENFUHS, THEODOR
Year of Publication 22.05.1974
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Year of Publication 22.05.1974
Patent
DE2018168
PAPENFUHR, THEODOR, SPIETSCHKA, ERNST., 6271 OBERAUROFF, REHBERG, ROLF
Year of Publication 11.10.1973
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Year of Publication 11.10.1973
Patent