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Patent:US2807348
| Patent: | US 2807348 |
| Title: | Platen guard for listing adding machine |
| Date: | 24.09.1957 |
| Place: | |
| Country: | USA |
| Person: | Balaz, Charles (P), Chall, Harold (P) |
| Company: | Friden (P) |
| Internal Links: | |
| Keywords: | |
| Link to the patent office: (without guarantee) |  US2807348 (espacenet), US2807348 (uspto) |
Aus der Patentschrift US2807348
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