4. Metal working
  5. Method of mechanical manufacture
  6. Structural member making

James P. Hopper

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Locking system for a double-hung window

Closure fasteners – Bolts – Sliding
Patent

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Method of producing a window sash

Metal working – Method of mechanical manufacture – Structural member making
Patent

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Window sash and an associated method of making a window sash

Static structures (e.g. – buildings) – Window or window sash – sill – mullion – or glazing – Having a drain or vent
Patent

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Profile ID: LFUS-PAI-P-1039038

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