4. Weighing scales
  5. Plural distinct load holders with common evaluator
  6. Load comparing type

Donald R. Langevin

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Adjustable balance and indicating device

Weighing scales – With alarm or signal – In unbalance
Patent

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Electrical counting scale

Weighing scales – Plural distinct load holders with common evaluator – Load comparing type
Patent

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Ladder for boarding small boats

Fire escape – ladder – or scaffold – Ladder – With hook or grab
Patent

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Profile ID: LFUS-PAI-P-775259

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