Assignee
MANNESMANN ROEHREN WERKE AG
DE·26 granted patents·2 pending applications·504 citations·filing 1974–2007
Top patents by PatentIndex Score
28 records- 0191US6931931B2Device for ultrasonic weld seam testing of longitudinally welded pipes for longitudinal and transversal errorsMANNESMANN ROEHREN WERKE AG·Filed 2002·Granted Aug 23, 2005·126 cites·13 claims
- 0291US4243493AProcess for transportation and distillation of petroleum with methanolMANNESMANN ROEHREN WERKE AG·Filed 1978·Granted Jan 6, 1981·58 cites·6 claims
- 0389US6843131B2Method of detecting discontinuities on elongated workpiecesMANNESMANN ROEHREN WERKE AG·Filed 2003·Granted Jan 18, 2005·52 cites·6 claims
- 0488US6866815B2Metallurgical vessel and method for producing the sameMANNESMANN ROEHREN WERKE AG·Filed 2003·Granted Mar 15, 2005·27 cites·19 claims
- 0587US4009893ATubing or casing jointMANNESMANN ROEHREN WERKE AG·Filed 1975·Granted Mar 1, 1977·81 cites·7 claims
- 0675US7012217B2Method and apparatus for making welded large pipesMANNESMANN ROEHREN WERKE AG·Filed 2004·Granted Mar 14, 2006·10 cites·24 claims
- 0774US4027688ATransportation of fossil fuel materialsMANNESMANN ROEHREN WERKE AG·Filed 1975·Granted Jun 7, 1977·26 cites·10 claims
- 0871US3948070AMotion control for the feed mechanism in pilger rolling millsMANNESMANN ROEHREN WERKE AG·Filed 1975·Granted Apr 6, 1976·14 cites·10 claims
- 0969US6648209B2Process for producing welded steel pipes with a high degree of strength, ductility and deformabilityMANNESMANN ROEHREN WERKE AG·Filed 2001·Granted Nov 18, 2003·10 cites·30 claims
- 1062US6887020B2Device for deburring the inside of a longitudinally seam-welded pipe, and method for adjusting a device of this typeMANNESMANN ROEHREN WERKE AG·Filed 2004·Granted May 3, 2005·10 cites·9 claims
- 1162US4022045ATube bending apparatusMANNESMANN ROEHREN WERKE AG·Filed 1976·Granted May 10, 1977·19 cites·6 claims
- 1259US4131026AUltrasonic testing of seamsMANNESMANN ROEHREN WERKE AG·Filed 1975·Granted Dec 26, 1978·16 cites·7 claims
- 1354US4024946ATransverse movement of elongated stockMANNESMANN ROEHREN WERKE AG·Filed 1975·Granted May 24, 1977·7 cites·5 claims
- 1450US6613272B2Vessel for metallurgical purposesMANNESMANN ROEHREN WERKE AG·Filed 2001·Granted Sep 2, 2003·2 cites·27 claims
- 1543US2008040922A1Method and apparatus for making metallic, non-rotationally symmetric ringsMANNESMANN ROEHREN WERKE AG·Filed 2007·Application pending·0 cites
- 1642US3958796AQuench-hardening of pipesMANNESMANN ROEHREN WERKE AG·Filed 1974·Granted May 25, 1976·5 cites·7 claims
- 1739US6446565B2Blast tuyere for shaft furnaces, in particular blast furnaces or hot-blast cupola furnacesMANNESMANN ROEHREN WERKE AG·Filed 2001·Granted Sep 10, 2002·6 cites·11 claims
- 1838US4038550AMethod and an apparatus for the measuring of the wall thickness of a tubeMANNESMANN ROEHREN WERKE AG·Filed 1975·Granted Jul 26, 1977·8 cites·2 claims
- 1937US4099402AStretch reducing of hollow stockMANNESMANN ROEHREN WERKE AG·Filed 1976·Granted Jul 11, 1978·3 cites·2 claims
- 2037US2005204556A1Method and apparatus for making metallic, non-rotationally symmetric ringsMANNESMANN ROEHREN WERKE AG·Filed 2004·Application pending·0 cites
- 2135US6936119B2Method for producing metallic, non-rotationally symmetrical rings with a constant wall thickness over their circumferenceMANNESMANN ROEHREN WERKE AG·Filed 2001·Granted Aug 30, 2005·2 cites·6 claims
- 2233US3950978AStretch-forming of long tubesMANNESMANN ROEHREN WERKE AG·Filed 1975·Granted Apr 20, 1976·3 cites·8 claims
- 2332US3963514ARemoval of excess metal from the welding seam in the interior of a pipeMANNESMANN ROEHREN WERKE AG·Filed 1974·Granted Jun 15, 1976·4 cites·3 claims
- 2429US4304574AHeating system for fluidized bed gas generatorMANNESMANN ROEHREN WERKE AG·Filed 1980·Granted Dec 8, 1981·6 cites·7 claims
- 2528US4006622AContinuous process for the production of very long precision tubes and installation for carrying out the processMANNESMANN ROEHREN WERKE AG·Filed 1975·Granted Feb 8, 1977·3 cites·5 claims
- 2624US4031738APlug for plug rollingMANNESMANN ROEHREN WERKE AG·Filed 1975·Granted Jun 28, 1977·3 cites·3 claims
- 2721US4089122ANoise attenuation during steam blowing of coated tubesMANNESMANN ROEHREN WERKE AG·Filed 1975·Granted May 16, 1978·2 cites·15 claims
- 2821US4033164AMethod for rolling tubesMANNESMANN ROEHREN WERKE AG·Filed 1975·Granted Jul 5, 1977·1 cites·4 claims
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