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Patent:AT148110B
| Patent: | AT 148110B |
| Title: | Stabförmiges Hilfsmittel für den Rechenunterricht |
| Date: | 16.08.1936 |
| Place: | Feistritz |
| Country: | Austria |
| Person: | Josef Reinthaler Josef Gruber |
| Company: | |
| Internal Links: | Abakus; Lehrmittel |
| Keywords: | |
| Link to the patent office: (without guarantee) |  AT148110B |
AT148110 Bilder