4. Static structures (e.g., buildings)
  5. With entrance for persons or objects in horizontal or...
  6. With additional enclosure structure; e.g., manhole

Ralph Peter Hegler

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Apparatus for the manufacture of corrugated plastic pipes

Plastic article or earthenware shaping or treating: apparatus – Sets of press couples comprising registering female mold...
Reexamination Certificate

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Apparatus for the production of plastic compound pipes

Plastic article or earthenware shaping or treating: apparatus – Means feeding fluent stock from plural sources to common... – Extrusion shaping means
Patent

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Composite pipe with a socket and method for its manufacture

Pipes and tubular conduits – Combined – With end structure
Patent

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Composite pipe with integral socket

Pipes and tubular conduits – Combined – With end structure
Patent

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Device for producing profiled tubes consisting of synthetic...

Plastic article or earthenware shaping or treating: apparatus – With apparatus assembly or dismantling means or with idle part – Including support or guide means for disassembled element
Reexamination Certificate

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Profile ID: LFUS-PAI-P-570606

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