4. Cutlery

Kurt H. Trzeciak

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Adjustable bent sub

Pipe joints or couplings – Adjustable angle
Patent

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Bearing assembly with adjustable lock nut

Cutlery
Patent

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In-hole motor drill with bit clutch

Boring or penetrating the earth – With below-ground tool drive prime mover – With positive connection between tool and support shaft for...
Patent

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Speed changer for in-hole motors

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

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Profile ID: LFUS-PAI-P-1486826

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