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Patent:US1504800
| Patent: | US 1504800 |
| Title: | Combined typewriting and computing machine |
| Date: | 12.08.1924 |
| Place: | New Orleans |
| Country: | USA |
| Person: | John A. Wherry |
| Company: | Underwood (P) Typewriter Comp. |
| Internal Links: | |
| Keywords: | |
| Link to the patent office: (without guarantee) |  US1504800 (espacenet), US1504800 (uspto) |
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