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Patent:GB246134


Patent:GB 246134
Title:Improvements in Calculating Devices.
Date:15.01.1925
Place:FriedrichCarl-Strasse 4, Wannsee, Deutschland
Country:Great Britain
Person:Bergmann, Jean (P)
Company:
Internal Links:Universal Calculator
Keywords:
Link to the patent office:
(without guarantee)
 GB246134


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Aus der Patentschrift GB246134

"Adding and subtracting apparatus combined with a book of multiplication &c. tables. " ( GB246134)