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Patent:US2255030
| Patent: | US 2255030 |
| Title: | Keyboard locking device |
| Date: | 02.09.1941 |
| Place: | Binghamton, NY und New York |
| Country: | USA |
| Person: | Henry L. Tholstrup |
| Company: | IBM (P) |
| Internal Links: | |
| Keywords: | |
| Link to the patent office: (without guarantee) |  US2255030 (espacenet), US2255030 (uspto) |
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