DE 77h.12
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- Patents in this category
- Patent DE-1905-175273 (National tech categories: DE 77h.12, Inventors: M. J. Wiessing)
- Patent DE-1909-228654 (National tech categories: DE 77h.12, Inventors: Christopher Antoonovich)
- Patent DE-1913-330014 (National tech categories: DE 77h.12, Inventors: Louis-Adolphe Hayot)
| Enclosing categories | DE 77h |
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