Fountain pens
Fountain pens
Fountain pens
Fountain pens
Fountain pens
Fountain pens
Fountain pens
Fountain pens
Four part ball point pen mechanism
Fragment auto-cleaned eraser
Framed filament loom for interpolating between parallel lines
Geometric instrument and method of making same
Glass graduating machine
Graduated ruler with perspective scales
Graduating appliance
Guide means for envelope opening apparatus
Hand blotter
Hand mounted eraser
Hand rest
Hand rest, card holder, etc.