4. Chemistry of inorganic compounds
  5. Oxygen or compound thereof
  6. Metal containing

Hepworth & Grandage Limited

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Composite materials and their production

Stock material or miscellaneous articles – Composite – Of metal
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Oil ring design

Seal for a joint or juncture – Seal between relatively movable parts – Relatively rotatable radially extending sealing face member
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Production of a form of alumina whiskers

Chemistry of inorganic compounds – Oxygen or compound thereof – Metal containing
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