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Patent:US2230673
| Patent: | US 2230673 |
| Title: | Multiplying and checking machine |
| Date: | 04.02.1941 |
| Place: | Ridgewood, NJ |
| Country: | USA |
| Person: | Robert Blakely Arthur H. Dickinson |
| Company: | IBM (P) |
| Internal Links: | |
| Keywords: | |
| Link to the patent office: (without guarantee) |  US2230673 (espacenet), US2230673 (uspto) |
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