Concetto:Patented in 1919
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Descrizione del concetto "Patented in 1919"Feed RDF
Patents registered in 1919
[[Categoria:Patents]] [[Patent date::≥1 gennaio 1919]] [[Patent date::≤31 dicembre 1919]]
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- File:Patent-US-1301341.pdf +
- File:Patent-US-1302783.pdf +
- File:Patent-US-1302935.pdf +
- File:Patent-US-1304739.pdf +
- File:Patent-US-1307630.pdf +
- File:Patent-US-1310235.pdf +
- File:Patent-US-1312681.pdf +
- File:Patent-US-1313056.pdf +
- File:Patent-US-1315373.pdf +
- File:Patent-US-1317472.pdf +
- File:Patent-US-1317817.pdf +
- File:Patent-US-1320393.pdf +
- File:Patent-US-1321188.pdf +
- File:Patent-US-1325844.pdf +
- File:Patent-US-1326206.pdf +