4. Machine element or mechanism
  5. Elements
  6. Gear casings

John H. Widdowson

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Adapter for photographic enlarger and method of attaching same

Photocopying – Projection printing and copying cameras – Illumination systems or details
Patent

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Adjustable sharpener for self-sharpening feed chopping knives

Abrasive tool making process – material – or composition – Impregnating or coating an abrasive tool
Patent

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Adjustable stilt

Undertaking
Patent

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Adjustable toilet

Baths – closets – sinks – and spittoons – Flush closet – Bowl
Patent

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Aircraft turn coordinator

Measuring and testing – Navigation – Take-off and landing monitors
Patent

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Profile ID: LFUS-PAI-P-8302

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