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Dr Ing Rudolf Hell GmbH

Dr Ing Rud
Active Patents
0
Total Holdings
2

Patent Holdings

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Patent No. Title Status Filing Date Grant Date Claims Actions
US2953639A Apparatus for automatically adjusting the operation of a fa… Expired / Lapsed 1955-11-04 1960-09-20 0 Details
US2909598A Producing printing plates with selectively variable reprodu… Expired / Lapsed 1956-07-03 1959-10-20 0 Details