Inventor · disambiguated record
Erich Quadflieg
Also filed as: QUADFLIEG ERICH
7 granted patents·314 citations·filing 1989–2001
88Inventor score
Top patents by PatentIndex Score
7 records- 0191US5048871AScrewed pipe jointMANNESMANN AG·Filed 1989·Granted Sep 17, 1991·97 cites·11 claims
- 0287US6155613APipe jointMANNESMANN AG·Filed 1995·Granted Dec 5, 2000·80 cites·17 claims
- 0379US6585299B1Pipe connectorMANNESMANN AG·Filed 1998·Granted Jul 1, 2003·53 cites·13 claims
- 0470US6511102B2Pipe connectorVALLOUREC MANNESMANN OIL & GAS·Filed 2001·Granted Jan 28, 2003·43 cites·24 claims
- 0552US4955644ADrill pipe couplingMANNESMANN AG·Filed 1989·Granted Sep 11, 1990·20 cites·9 claims
- 0637US6513840B1Drill rod couplingMANNESMANN AG·Filed 1999·Granted Feb 4, 2003·10 cites·8 claims
- 0734US5145710AMethod and apparatus for applying a metallic coating to threaded end sections of plastic pipes and resulting pipeMANNESMANN AG·Filed 1990·Granted Sep 8, 1992·11 cites·16 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →