4. Boring or penetrating the earth
  5. With tool shaft detail
  6. Axially telescoping shaft section

Robert E. Barrows

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Air line lubricator

Lubrication – Lubricators – Force feed
Patent

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Cross band coupling for stepper-motor-driven, rigid magnetic dis

Dynamic magnetic information storage or retrieval – Record transport with head stationary during transducing – Drum record
Patent

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Disc memory apparatus magnetic head carriage manual control

Dynamic magnetic information storage or retrieval – Record transport with head stationary during transducing – Disk record
Patent

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Down hole drill chuck lock

Boring or penetrating the earth – With tool shaft detail – Axially telescoping shaft section
Patent

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Lubricator

Lubrication – Lubricators – Force feed
Patent

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Profile ID: LFUS-PAI-P-83374

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