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Koch and Sterzel AG

Koch and S
Active Patents
0
Total Holdings
2

Patent Holdings

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Patent No. Title Status Filing Date Grant Date Claims Actions
US2087995A Arrangement for measuring direct current Expired / Lapsed 1934-03-07 1937-07-27 0 Details
DE535934C Device for generating periodically rising and falling pulsa… Expired / Lapsed 1929-06-23 1931-10-17 0 Details