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Patent:US2162237
| Patent: | US 2162237 |
| Title: | Electrical Control Device |
| Date: | 13.06.1939 |
| Place: | |
| Country: | USA |
| Person: | Avery, Harold (P) |
| Company: | Marchant (P) |
| Internal Links: | |
| Keywords: | |
| Link to the patent office: (without guarantee) |  US2162237 (espacenet), US2162237 (uspto) |
Aus der Patentschrift US2162237
- DATUM: 13.06.1939
- TITEL: Electrical control device
- PERSON: MARCHANT CALCULATING MACHINE C