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Heinrich Koppers GmbH

Heinrich K
Active Patents
0
Total Holdings
2

Patent Holdings

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Patent No. Title Status Filing Date Grant Date Claims Actions
GB357187A Improvements in or relating to recording devices for coke-o… Expired / Lapsed 1930-06-18 — 0 Details
US956371A Method of distilling coal. Expired / Lapsed 1909-05-20 1910-04-26 0 Details