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Fatti riguardanti Patent-US-1893130.pdf
Application date | dicembre 9, 1931 + |
Application number | 579966 + |
Assigned to | Mirko Chelazzi, Dino Frulli + |
Invented by | Mirko Chelazzi + e Dino Frulli + |
Patent date | gennaio 3, 1933 + |
Patent description | Penna doppia + |
Patent number | 1893130 + |
Patent title | Fountain pen + |
Patented by | Zerollo + |
Patented in | US + |
Priority date | dicembre 9, 1930 + |
Same invention of | ![]() ![]() |