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Patent:US2089820
| Patent: | US 2089820 |
| Title: | Calculating Machine |
| Date: | 10.08.1937 |
| Place: | |
| Country: | USA |
| Person: | E. C. Walter |
| Company: | Monroe (P) |
| Internal Links: | |
| Keywords: | |
| Link to the patent office: (without guarantee) |  US2089820 (espacenet), US2089820 (uspto) |
Aus der Patentschrift US2089820
- DATUM: 10.08.1937
- TITEL: Calculating machine
- PERSON: MONROE CALCULATING MACHINE