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Patent:USRE20834
| Patent: | US RE20834 |
| Title: | Drawing Instrument |
| Date: | 23.08.1938 |
| Place: | |
| Country: | USA |
| Person: | K. Rabe |
| Company: | |
| Internal Links: | |
| Keywords: | |
| Link to the patent office: (without guarantee) |  USRE20834 (espacenet), USRE20834 (uspto) |
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