4. Metal working
  5. Means to assemble or disassemble
  6. Puller or pusher means, contained force multiplying operator

Harrisburg, Inc.

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Method for manufacturing a guide base of a valve

Metal working – Means to assemble or disassemble – Puller or pusher means – contained force multiplying operator
Patent

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Mud pump valve

Fluid handling – Line condition change responsive valves – Direct response valves
Patent

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Stretching mechanism for a screen

Liquid purification or separation – With repair or assembling means
Patent

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Valve member and method of making such a member

Fluid handling – Line condition change responsive valves – Direct response valves
Patent

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