4. Hydraulic and earth engineering
  5. Subterranean or submarine pipe or cable laying, retrieving,...
  6. Repair, replacement, or improvement

Volker Hahn

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Method and apparatus for producing underground pipes

Hydraulic and earth engineering – Subterranean or submarine pipe or cable laying – retrieving,... – Repair – replacement – or improvement
Patent

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Method of and arrangement for correcting the height of railway u

Railways: surface track – Roadbed – Continuous
Patent

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Overhead sound attenuating cover for roadways and railways

Acoustics – Sound-modifying means – Sound absorbing fence or screen
Patent

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Rotary drum

Agitating – By injecting gas into mixing chamber – Into rotating mixing chamber
Patent

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Space framework

Static structures (e.g. – buildings) – Openwork; e.g. – truss – trellis – grille – screen – frame – or... – Components adjustably or collapsibly connected
Patent

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Profile ID: LFUS-PAI-P-1173696

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