4. Geometrical instruments
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Protractor

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

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Protractor

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

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Protractor

Geometrical instruments – Gauge – Angle
Reexamination Certificate

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Protractor

Geometrical instruments – Straightedge type – Square and pivoted straightedge
Patent

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Protractor

Geometrical instruments – Straightedge type – Square and pivoted straightedge
Reexamination Certificate

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Protractor and ruler combination

Geometrical instruments – Scriber – Curved line
Reexamination Certificate

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Protractor bubble level

Geometrical instruments – Indicator of direction of force traversing natural media – Attaching means
Patent

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Protractor for calculating miter and bevel angles for...

Geometrical instruments – Straightedge type – Plural straightedges – relatively moveable
Reexamination Certificate

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Protractor unit for drawing-board

Geometrical instruments – Straightedge type – Base attached
Patent

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Protractor with a rotor

Geometrical instruments – Straightedge type – Base attached
Patent

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Protractor with an auxiliary ruler

Geometrical instruments – Straightedge type – Plural straightedges – relatively moveable
Reexamination Certificate

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Protractor with digital readout

Geometrical instruments – Area integrators – Electrical
Patent

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Protractor with electronic measuring device and digital display

Geometrical instruments – Miscellaneous – Light direction
Patent

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Protractor-chalkline

Geometrical instruments – Straightedge type – Cord type
Patent

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Protractor-type hatching control device

Geometrical instruments – Area integrators – Electrical
Patent

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Proximity differential indicator for aligning machine tools

Geometrical instruments – Gauge – Collocating
Patent

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Proximity measuring device for golfers

Geometrical instruments – Area integrators – Electrical
Patent

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Pull element travel sensor

Geometrical instruments – Distance measuring – Of flexible material
Reexamination Certificate

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Pull out fusible switches

Geometrical instruments
Patent

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Pull-out receptacle for floor ducts

Geometrical instruments
Patent

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