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Ellipse compass

Geometrical instruments – Scriber – Curved line
Patent

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Ellipse drawing instrument

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Ellipse drawing instrument

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Ellipse drawing/cutting device

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Reexamination Certificate

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Ellipse Scribe

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Ellipsograph

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Ellipsograph

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Ellipsograph

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Ellipsograph

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Ellipsograph

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Ellipsograph

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Ellipsograph

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Ellipsograph

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Ellipsograph

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Ellipsograph

Geometrical instruments – Scriber – Curved line
Reexamination Certificate

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Ellipsograph as a drafting tool

Geometrical instruments – Scriber – Curved line
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Ellipsograph capable of drawing dotted line

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Ellipsograph drafting apparatus

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Ellipsograph structure

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Eyeglass frame and lens tracing apparatus and method

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