Proprietà:Patent title
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Titolo del brevetto (come riportato sullo stesso).
P
Improvements in or relating to Fountain or Reservoir Pens +
Improvements in pens, pencils, and similar writing instruments +
Improvements in or relating to self-filling fountain pens +
Improved fountain pen +
Improvements in fountain pens +
Improvements in and relating to Fountain Pens +
Improvements in and relating to Fountain Pens +
Improvements in or relating to self-filling fountain pens +
Improvements relating to propelling pencils +
Improvements in or relating to Fountain Pens +
Improvements in and relating to magazine lead pencils with selectively interchangeable lead holders +
Improvements in or relating to stylographic pens +
Improvements in or relating to self-filling fountain pens +
Writing implement +
Improvements in and relating to magazine lead pencils with selectively interchangeable lead holders +
Improvements in or relating to fountain pens +
Improvements in or relating to pencil holders +
Improvements in or relating to propelling pencils +
Improvements in self-filling fountain pens +
Improvements in and relating to writing implement having interchangeable leads +