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Patent:US1624318
| Patent: | US 1624318 |
| Title: | Adding attachment for typewriting machines |
| Date: | 12.04.1927 |
| Place: | Hartford, CT und New York |
| Country: | USA |
| Person: | Degener, Gustave O. (P) |
| Company: | Royal Typewriter (P) Comp. |
| Internal Links: | |
| Keywords: | |
| Link to the patent office: (without guarantee) |  US1624318 (espacenet), US1624318 (uspto) |
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