LandOfFree - US Patents - Listing for Geometrical instruments,Straightedge type,Base attached

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Parallel rule

Geometrical instruments – Straightedge type – Base attached

Patent

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Parallel ruler

Geometrical instruments – Straightedge type – Base attached

Patent

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Parallel straightedge

Geometrical instruments – Straightedge type – Base attached

Patent

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Parallel-ruling straightedge

Geometrical instruments – Straightedge type – Base attached

Patent

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Perspective drafting apparatus

Geometrical instruments – Straightedge type – Base attached

Patent

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Perspective drafting instrument

Geometrical instruments – Straightedge type – Base attached

Patent

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Perspective drawing alignment apparatus

Geometrical instruments – Straightedge type – Base attached

Patent

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Perspective drawing apparatus

Geometrical instruments – Straightedge type – Base attached

Patent

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Perspective drawing machine

Geometrical instruments – Straightedge type – Base attached

Patent

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Perspective drawing machine

Geometrical instruments – Straightedge type – Base attached

Patent

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Perspective drawing machine

Geometrical instruments – Straightedge type – Base attached

Patent

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Perspective view apparatus

Geometrical instruments – Straightedge type – Base attached

Patent

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Perspective view drafting device

Geometrical instruments – Straightedge type – Base attached

Reexamination Certificate

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Plotting and drafting apparatus with magnetic guide

Geometrical instruments – Straightedge type – Base attached

Patent

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Plotting board with magnetic pivot

Geometrical instruments – Straightedge type – Base attached

Reexamination Certificate

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Portable drafting device for drawing parallel lines, comprising

Geometrical instruments – Straightedge type – Base attached

Patent

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Portable drawing apparatus

Geometrical instruments – Straightedge type – Base attached

Patent

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Portable drawing board for art students

Geometrical instruments – Straightedge type – Base attached

Reexamination Certificate

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Portable lighted drafting table

Geometrical instruments – Straightedge type – Base attached

Patent

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Protractable straight-edge with vise

Geometrical instruments – Straightedge type – Base attached

Patent

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