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Patent:AT89720B
| Patent: | AT 89720B |
| Title: | Addiermaschine mit Typeneinstellung |
| Date: | 08.10.1920 |
| Place: | Berlin, Deutschland |
| Country: | Austria |
| Person: | |
| Company: | Berliner Broncegiesserei (P) Rohrbach und Cie. |
| Internal Links: | |
| Keywords: | |
| Link to the patent office: (without guarantee) |  AT89720B |
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