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Ellipsograph

Geometrical instruments – Scriber – Curved line
Patent

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Ellipsograph

Geometrical instruments – Scriber – Curved line
Patent

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Ellipsograph

Geometrical instruments – Scriber – Curved line
Patent

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Ellipsograph

Geometrical instruments – Scriber – Curved line
Patent

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Ellipsograph

Geometrical instruments – Scriber – Curved line
Patent

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Ellipsograph

Geometrical instruments – Scriber – Curved line
Patent

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Ellipsograph

Geometrical instruments – Scriber – Curved line
Patent

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Ellipsograph

Geometrical instruments – Scriber – Curved line
Patent

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Ellipsograph

Geometrical instruments – Scriber – Curved line
Patent

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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
Patent

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Ellipsograph capable of drawing dotted line

Geometrical instruments – Scriber – Curved line
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Ellipsograph drafting apparatus

Geometrical instruments – Scriber – Curved line
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Ellipsograph structure

Geometrical instruments – Scriber – Curved line
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Eyeglass frame and lens tracing apparatus and method

Geometrical instruments – Scriber – Curved line
Reexamination Certificate

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Eyeglass frame measurement apparatus

Geometrical instruments – Scriber – Curved line
Reexamination Certificate

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Eyeglasses frame tracing device

Geometrical instruments – Scriber – Curved line
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Feed index device in universal parallel ruler or the like

Geometrical instruments – Scriber – Curved line
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Flat compass for marking large arcsand circles

Geometrical instruments – Scriber – Curved line
Reexamination Certificate

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Garden row locator and marker

Geometrical instruments – Scriber – Curved line
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