James E. Steffen
21Patents
12h-index
34Co-inventors
81Inventor score
Filing activity: Dec 23, 1987 → Feb 15, 2012
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5656368A | Fibrous filtration face mask having corrugated polymeric microfiber filter layer | Emerging Cross-Sectional Technologies | 79 | Expired |
| US5620545A | Method of making a corrugated nonwoven web of polymeric microfiber | Emerging Cross-Sectional Technologies | 71 | Expired |
| US6010766A | Corrugated nonwoven webs of polymeric microfiber | Emerging Cross-Sectional Technologies | 52 | Expired |
| US5804295A | Fibrous filtration face mask having corrugated polymeric microfiber filter layer | Emerging Cross-Sectional Technologies | 46 | Expired |
| US5763078A | Filter having corrugated nonwoven webs of polymeric microfiber | Emerging Cross-Sectional Technologies | 45 | Expired |
| US4997034A | Heat exchanger | Mechanical Engineering; Lighting; Heating | 33 | Expired |
| US5753343A | Corrugated nonwoven webs of polymeric microfiber | Emerging Cross-Sectional Technologies | 32 | Expired |
| US5440146A | Radiographic image reader | Electricity | 30 | Expired |
| US5773839A | Cassette for use in an electronic radiographic imaging system | Physics | 27 | Expired |
| USD347298S | Valve cover | General | 26 | Expired |
| US5830311A | Corrugating apparatus | Emerging Cross-Sectional Technologies | 16 | Expired |
| US7167193B2 | Active cooling system for laser imager | Physics | 13 | Expired |
| USD408838S | Medical imager | General | 11 | Expired |
| US5639700A | Thermal insulation containing corrugated nonwoven web of polymeric microfiber | Emerging Cross-Sectional Technologies | 10 | Expired |
| USD690413S1 | Filter cover for powered air purifying respirator | General | 9 | Active |
| USD681190S1 | Filter cover for powered air purifying respirator | General | 9 | Active |
| USD680641S1 | Filter cover for powered air purifying respirator | General | 9 | Active |
| US6064416A | Linear translation system for use in a laser imaging system | Electricity | 4 | Expired |
| US5961778A | Corrugating apparatus | Emerging Cross-Sectional Technologies | 3 | Expired |
| USD690414S1 | Powered air purifying respirator (PAPR) having control panel | General | 2 | Active |
| US5955193A | Apparel containing corrugated microfiber-containing thermal insulation | Emerging Cross-Sectional Technologies | 2 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.