4. Geometrical instruments
  5. Miscellaneous
  6. Light direction

Masao Koenuma

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Feed index device in universal parallel ruler or the like

Geometrical instruments – Scriber – Curved line
Patent

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Universal parallel ruler for three-dimensional drawing

Geometrical instruments – Straightedge type – Base attached
Patent

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Universal parallel ruler including scale setting device

Geometrical instruments – Straightedge type – Base attached
Patent

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Universal parallel ruler with converted display of displacement

Geometrical instruments – Straightedge type – Base attached
Patent

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Universal parallel ruler with converted display of displacement

Geometrical instruments – Straightedge type – Base attached
Patent

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Profile ID: LFUS-PAI-P-228100

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