Inventor · disambiguated record
Helmut Landgraf
Also filed as: LANDGRAF HELMUT
11 granted patents·112 citations·filing 1971–1982
90Inventor score
Top patents by PatentIndex Score
11 records- 0178US3931850AApparatus for feeding and distributing steel meltsMANNESMANN AG·Filed 1975·Granted Jan 13, 1976·15 cites·10 claims
- 0274US3954541AWelding of thermoplastics through resistance heatingMANNESMANN AG·Filed 1974·Granted May 4, 1976·27 cites·8 claims
- 0360US3969170AMethod for making a thermoplastic sleeve to be used as coupler fitting for tubesMANNESMANN AG·Filed 1971·Granted Jul 13, 1976·19 cites·16 claims
- 0455US4519863AMethod and device for jacketing a steel pipe with several plastic materialsMANNESMANN AG·Filed 1982·Granted May 28, 1985·18 cites·9 claims
- 0545US4386996AApparatus for the jacketing of steel pipesMANNESMANN AG·Filed 1981·Granted Jun 7, 1983·10 cites·6 claims
- 0644US4046603AProcess for the continuous hardening of tubesMANNESMANN AG·Filed 1975·Granted Sep 6, 1977·6 cites·12 claims
- 0742US3958796AQuench-hardening of pipesMANNESMANN ROEHREN WERKE AG·Filed 1974·Granted May 25, 1976·5 cites·7 claims
- 0837US3972761AWrapping of pipes or tubesMANNESMANN AG·Filed 1975·Granted Aug 3, 1976·8 cites·11 claims
- 0931US4501632AWrapping steel pipes in a thermoplastic ribbonMANNESMANN AG·Filed 1982·Granted Feb 26, 1985·2 cites·9 claims
- 1031US4173880ACooled mandrelMANNESMANN AG·Filed 1978·Granted Nov 13, 1979·1 cites·8 claims
- 1129US4184839ARoller track for pipesMANNESMANN AG·Filed 1977·Granted Jan 22, 1980·1 cites·5 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →