Proprietà:Patent title

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Titolo del brevetto (come riportato sullo stesso).

precedenti 202050100250500successivi 20
Showing 20 pages using this property.
P
Patent-US-2217502.pdf +
Stylographic pen  +
Patent-US-2217755.pdf +
Fountain pen  +
Patent-US-2218536.pdf +
Fountain pen  +
Patent-US-2219769.pdf +
Mechanical pencil  +
Patent-US-2222599.pdf +
Penholder  +
Patent-US-2223541.pdf +
Fountain pen  +
Patent-US-2224162.pdf +
Letter opener  +
Patent-US-2225864.pdf +
Fountain pen  +
Patent-US-2228250.pdf +
Manufacture of writing pens  +
Patent-US-222959.pdf +
Improvement in fountain-pens  +
Patent-US-2229749.pdf +
Fountain pen  +
Patent-US-2232231.pdf +
Tip for a marking instrument  +
Patent-US-2233846.pdf +
Fountain pen  +
Patent-US-2236720.pdf +
Tip for mechanical pencils or the like  +
Patent-US-2237155.pdf +
Clip and cap structure for fountain pens  +
Patent-US-2239526.pdf +
Reversible eraser tip  +
Patent-US-2241203.pdf +
Apparatus for making pencil leads  +
Patent-US-2241846.pdf +
Receptacle for liquids  +
Patent-US-2241850.pdf +
Pressure bar for fountain pens  +
Patent-US-2241852.pdf +
Receptacle for fountain pens  +
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