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Ice surface line applicator

Geometrical instruments – Scriber – Curved line
Patent

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Illuminated progressive lens marker

Geometrical instruments – Scriber – Curved line
Patent

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Infinite radius circle drawing instrument

Geometrical instruments – Scriber – Curved line
Patent

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Infinitely variable drawing instrument

Geometrical instruments – Scriber – Curved line
Patent

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Instrument for drawing ellipse or the like

Geometrical instruments – Scriber – Curved line
Reexamination Certificate

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Instrument for drawing geometric figures

Geometrical instruments – Scriber – Curved line
Patent

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Instrument for making perspective drawing

Geometrical instruments – Scriber – Curved line
Patent

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Instrument for tracing curved figures particularly ellipses

Geometrical instruments – Scriber – Curved line
Patent

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Instruments for drawing circles

Geometrical instruments – Scriber – Curved line
Patent

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Irregular surface ellipsograph

Geometrical instruments – Scriber – Curved line
Patent

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