4. Motors: spring, weight, or animal powered
  5. Weight
  6. With weight raising means,
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Apparatus for utilizing the impact force of bodies falling under

Motors: spring – weight – or animal powered – Weight – With weight raising means
Patent

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Method and apparatus for oil well pumping

Motors: spring – weight – or animal powered – Weight – With weight raising means
Reexamination Certificate

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Power-loop apparatus and method

Motors: spring – weight – or animal powered – Weight – With weight raising means
Reexamination Certificate

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Weight driven rotary power generating apparatus

Motors: spring – weight – or animal powered – Weight – With weight raising means
Patent

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Weight operated mechanical drive

Motors: spring – weight – or animal powered – Weight – With weight raising means
Reexamination Certificate

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