4. Boring or penetrating the earth
  5. With below-ground tool drive prime mover
  6. Fluid rotary type

Wallace Clark

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Device for selectively depressing a telephone switch

Telephonic communications – Terminal accessory or auxiliary equipment – Attachable to terminal housing
Patent

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Down-hole earth drilling motor capable of free circulation

Boring or penetrating the earth – With bit wear signal generating
Patent

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Hearing aid with replaceable drying agent

Electrical audio signal processing systems and devices – Sound effects – Reverberators
Patent

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Hydraulic motor or pump

Ships – Building – Canal and ferry boats
Patent

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Hydraulic motor with variable speed

Rotary expansible chamber devices – Unlike helical surfaces on relatively wobbling rotating...
Patent

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Profile ID: LFUS-PAI-P-368449

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