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Patent:US2139168
| Patent: | US 2139168 |
| Title: | Calculating Machine |
| Date: | 06.12.1938 |
| Place: | |
| Country: | USA |
| Person: | Muller, Robert (P) |
| Company: | Burroughs (P) |
| Internal Links: | |
| Keywords: | |
| Link to the patent office: (without guarantee) |  US2139168 (espacenet), US2139168 (uspto) |
Aus der Patentschrift US2139168
- DATUM: 06.12.1938
- TITEL: Calculating machine
- PERSON: BURROUGHS ADDING MACHINE CO