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Patent:US1934747
| Patent: | US 1934747 |
| Title: | Adding and subtracting machine |
| Date: | 14.11.1933 |
| Place: | Rockford und Wilmington, DE |
| Country: | USA |
| Person: | Sundstrand, Oscar (P) |
| Company: | Sundstrand (P) Corp. |
| Internal Links: | |
| Keywords: | |
| Link to the patent office: (without guarantee) |  US1934747 (espacenet), US1934747 (uspto) |
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