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Patent:DE397429
| Patent: | DE 397429 |
| Title: | Rechenvorrichtung |
| Date: | 11.02.1925 |
| Place: | Berlin |
| Country: | Germany |
| Person: | Loetzbeyer, Philipp (P), Dr. |
| Company: | Gebr. Wichmann (P) m. b. H. |
| Internal Links: | Patent:DE399567 |
| Keywords: | |
| Link to the patent office: (without guarantee) |  DE397429 |
Aus der Patentschrift DE397429
- DATUM: 11.02.1925
- TITEL: Rechenvorrichtung
- PERSON: PHILIPP LOETZBEYER DR