Erik A. Steffensen
13Patents
10h-index
14Co-inventors
58Inventor score
Filing activity: Jun 15, 2001 → Nov 18, 2004
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6572190B2 | Lumbar support for a chair | Human Necessities | 265 | Expired |
| US6729691B2 | Chair back construction | Human Necessities | 228 | Expired |
| US6669292B2 | Ergonomic chair | Human Necessities | 192 | Expired |
| US7014269B2 | Chair back construction | Human Necessities | 156 | Expired |
| US7066537B2 | Chair back construction | Human Necessities | 153 | Expired |
| US6568760B2 | Chair of modular construction | Human Necessities | 84 | Expired |
| USD476821S1 | Ergonomic chair | General | 65 | Expired |
| USD462187S1 | Chair | General | 24 | Expired |
| USD460869S1 | Chair | General | 17 | Expired |
| USD477151S1 | Armless ergonomic chair | General | 16 | Expired |
| USD457421S1 | Castor | General | 4 | Expired |
| USD462858S1 | Chair back frame | General | 2 | Expired |
| USD477164S1 | Chair back | General | 0 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.