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Patent:US2278405
| Patent: | US 2278405 |
| Title: | Calculating machine casing |
| Date: | 31.03.1942 |
| Place: | Chicago |
| Country: | USA |
| Person: | Niemann, Frederick (P) |
| Company: | Felt und Tarrant (P) Mfg. Comp. |
| Internal Links: | |
| Keywords: | |
| Link to the patent office: (without guarantee) |  US2278405 (espacenet), US2278405 (uspto) |
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