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Navigational aid device

Geometrical instruments – Straightedge type – Base attached
Patent

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Navigational aid device for determining direction in a chart

Geometrical instruments – Straightedge type – Base attached
Patent

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Navigational aid for use with a map, chart, or the like

Geometrical instruments – Straightedge type – Plural straightedges – relatively moveable
Patent

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Navigational angle-measurement device

Geometrical instruments – Miscellaneous – Light direction
Patent

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Navigational assist system

Geometrical instruments – Miscellaneous – Light direction
Reexamination Certificate

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Navigational calculating device

Geometrical instruments – Straightedge type – Base attached
Patent

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Navigational calculating device

Geometrical instruments – Straightedge type – Base attached
Patent

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Navigational charting and calculating device

Geometrical instruments – Miscellaneous – Light direction
Patent

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Navigational computer

Geometrical instruments – Scriber – Curved line
Patent

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Navigational instrument

Geometrical instruments – Straightedge type – Plural straightedges – relatively moveable
Patent

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Navigational instrument for controlling the stability of a mobil

Geometrical instruments – Indicator of direction of force traversing natural media – Level or plumb – terrestrial gravitation responsive
Patent

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Navigational instruments

Geometrical instruments – Straight-line light ray type – Multisight line
Patent

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Navigational plotter

Geometrical instruments – Straightedge type – Base attached
Patent

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Navigational tape measure-type apparatus

Geometrical instruments – Distance measuring – By flexible tape
Patent

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Necktie-tying gauge

Geometrical instruments – Gauge – Collocating
Patent

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Needle indicator for rail liner

Geometrical instruments – Straight-line light ray type – Alignment device
Patent

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Needle indicator for rail liner

Geometrical instruments – Indicator of direction of force traversing natural media – Railway rail spacing and inclination
Patent

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Needlepoint sheet

Geometrical instruments – Miscellaneous – Light direction
Patent

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Network interface device

Geometrical instruments
Patent

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Network interface device

Geometrical instruments
Patent

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