4. Geometrical instruments
  5. Straightedge type
  6. Rules

John J. Murphy

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Control circuit for feedback, motor-operated valve

Electricity: motive power systems – Braking – Dynamic braking
Patent

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Measuring ruler

Geometrical instruments – Straightedge type – Rules
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Supply station with internal computer

Supports: cabinet structure – With lock or latch selector-operator
Patent

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Profile ID: LFUS-PAI-P-726923

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