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Patent:US1764959
| Patent: | US 1764959 |
| Title: | Calculating machine |
| Date: | 17.06.1930 |
| Place: | Oakland, CA und Piedmont, CA |
| Country: | USA |
| Person: | Clarence L. Johnston Carl M.F. Friden (P) |
| Company: | Marchant (P) Calculating Machine Comp. |
| Internal Links: | |
| Keywords: | |
| Link to the patent office: (without guarantee) |  US1764959 (espacenet), US1764959 (uspto) |
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