4. Office supplies; artists and teachers materials
  5. Teaching material
  6. Demonstrator or exhibitor

Bernard Bertrand

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Acceleration controlling device for an automobile vehicle

Internal-combustion engines – Poppet valve operating mechanism – With means for varying timing
Patent

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Device for recycling the exhaust gases of an internal combustion

Internal-combustion engines – Intake manifold – Manifold tuning – balancing or pressure regulating means
Patent

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Semaphoric educative toy

Office supplies; artists and teachers materials – Teaching material – Demonstrator or exhibitor
Patent

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Profile ID: LFUS-PAI-P-848248

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