4. Cutlery

Ruhrkohle AG

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Apparatus for extending ventilating conduits

Pipes and tubular conduits – Repairing
Patent

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Apparatus for extending ventilating conduits

Pipes and tubular conduits – Repairing
Patent

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Arrangement for hydraulically conveying solids

Cutlery
Patent

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Automatic excavating machine and method of operating the same

Mining or in situ disintegration of hard material – Automatic control; signaling or indicating – Of hard material disintegrating machine
Patent

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Coal liquefaction process

Mineral oils: processes and products – Products and compositions – Lubricating oils
Patent

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Profile ID: LFUS-PAI-P-17593

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