4. Fluid handling
  5. Line condition change responsive valves
  6. Pilot or servo controlled

Donald M. Allen

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Data manipulation operation keypad for use with a pointing devic

Coded data generation or conversion – Bodily actuated code generator – Including keyboard or keypad
Patent

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Pipeline surge reliever with sanitary barrier

Fluid handling – Line condition change responsive valves – With separate connected fluid reactor surface
Patent

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Surge relief apparatus and method

Fluid handling – Processes – Involving pressure control
Reexamination Certificate

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Surge relief apparatus and method

Fluid handling – Line condition change responsive valves – Pilot or servo controlled
Patent

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