4. Metal working
  5. Method of mechanical manufacture
  6. Shaping one-piece blank by removing material

Thermionics Laboratory, Inc.

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Gate valve with slideable closure expandable upon oscillation

Valves and valve actuation – With means to increase head and seat contact pressure – With positive reduction
Patent

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Seal structure for metal vacuum joint

Metal working – Method of mechanical manufacture – Shaping one-piece blank by removing material
Patent

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Seal structure for metal vacuum joint

Pipe joints or couplings – Packed – With cooperating opposed packing grooves
Patent

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