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1977-05-31
A joint for thermoplastic multi-walled pipes and a process for producing the same
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1983-05-19
A foamed resin structural material and process for manufacturing the same
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1984-12-31
Joint for pipes
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Pipe joint
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Method of forming oriented thermoplastic polymer material pipe
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Plastic pipe joint and method and assembly for making the same
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1984-05-29
Universal joint for plastic pipe
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1976-05-31
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1979-05-16
Composite tube made of coupled different plastic materials and method for manufacturing the same
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1976-11-30
A pipe of thermoplastic material and method for the production thereof
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Process and apparatus for the thermoplastic material
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1978-03-10
Thermoplastic multi-walled pipes and a joint for the pipes and a process for producing the same
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A joint for thermoplastic multi-walled pipes and a process for producing the same
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1978-06-13
Pipe joint
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1977-07-25
Pipe joint
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1977-11-28
Pipe joint
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1985-01-31
Helically fabricated flexible hose and mandrel device for producing the same
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Pipe joint arrangement
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Mold for forming synthetic resin elbow joint and the like
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1977-12-17
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Process for making sockets for plastic pipes
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Pipe joint