A/S Sonnichsen Rorvalseverket

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4798696 Method for extrusion of plastic tubes, and an apparatus for carrying out said methodExpiredMay 08, 87Jan 17, 89[B29C]
4591323 Extruder and calibrating apparatus for making ribbed or grooved pipeExpiredMay 08, 85May 27, 86[B29C, B29D]

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