4. Boring or penetrating the earth
  5. Bit or bit element
  6. Rolling cutter bit or rolling cutter bit element

Robert A. Felsman

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Air groove scraper

Boring or penetrating the earth – With mechanical cleaner for bit or cutter element
Patent

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Airmotor powered remote adjustable mirror

Optical: systems and elements – Mirror – With support
Patent

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Amphibious people powered vehicle

Transportation – Special purpose vehicle – Combined – e.g. – land-sea-air-type vehicle
Patent

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Anchor seal assembly

Wells – Processes – Placing or shifting well part
Patent

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Annulus operated test valve

Wells – Valves – closures or changeable restrictors – Fluid operated
Patent

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Profile ID: LFUS-PAI-P-7680

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