4. Geometrical instruments
  5. Indicator of direction of force traversing natural media
  6. Attaching means

Edwin E. Warburton

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Combined twin-nibbed marker and level

Office supplies; artists and teachers materials – Equipment for writing – drawing – or for fine arts – Plural or combined
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Level marker

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

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Profile ID: LFUS-PAI-P-596815

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