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Patent:US2222164
| Patent: | US 2222164 |
| Title: | Calculating Machine |
| Date: | 19.11.1940 |
| Place: | |
| Country: | USA |
| Person: | Avery, Harold (P) |
| Company: | Marchant (P) |
| Internal Links: | |
| Keywords: | |
| Link to the patent office: (without guarantee) |  US2222164 (espacenet), US2222164 (uspto) |
Aus der Patentschrift US2222164