Erich Quadflieg
7Patents
6h-index
7Co-inventors
52Inventor score
Filing activity: Jul 27, 1989 → Jul 10, 2001
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5048871A | Screwed pipe joint | Emerging Cross-Sectional Technologies | 71 | Expired |
| US6155613A | Pipe joint | Emerging Cross-Sectional Technologies | 53 | Expired |
| US6585299B1 | Pipe connector | Mechanical Engineering; Lighting; Heating | 39 | Expired |
| US6511102B2 | Pipe connector | Fixed Constructions | 20 | Expired |
| US4955644A | Drill pipe coupling | Fixed Constructions | 10 | Expired |
| US5145710A | Method and apparatus for applying a metallic coating to threaded end sections of plastic pipes and resulting pipe | Chemistry; Metallurgy | 7 | Expired |
| US6513840B1 | Drill rod coupling | Mechanical Engineering; Lighting; Heating | 3 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.