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|Application date||January 22, 1935 +|
|Application number||2976 +|
|Assigned to||W. A. Sheaffer Pen Company +|
|Invented by||Walter A. Sheaffer +|
|Patent date||April 9, 1935 +|
|Patent description||Caricamento Vacuum-Fil +|
|Patent number||RE19530 +|
|Patent title||Fountain pen +|
|Patented by||W. A. Sheaffer Pen Company +|
|Patented in||US +|
|Priority date||January 22, 1935 +|
|Used for feature||Plunger filler + and Vacuum-Fil +|