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Patent:US1537314
| Patent: | US 1537314 |
| Title: | Key-control mechanism for adding machines |
| Date: | 12.05.1925 |
| Place: | Cincinnati |
| Country: | USA |
| Person: | Landsiedel, Harry (P) |
| Company: | Dalton (P) Adding Machine Comp. |
| Internal Links: | |
| Keywords: | |
| Link to the patent office: (without guarantee) |  US1537314 (espacenet), US1537314 (uspto) |
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