Charles J. Steffens
19Patents
12h-index
10Co-inventors
75Inventor score
Filing activity: Sep 11, 1975 → Jun 11, 2012
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4946217A | Pickup box covers | Performing Operations; Transporting | 63 | Expired |
| US6527330B1 | Folding cargo bay cover for pickup truck | Performing Operations; Transporting | 60 | Expired |
| US6422635B1 | Folding cargo bay cover for pickup truck | Performing Operations; Transporting | 54 | Expired |
| US6565141B1 | Folding cargo bay cover for pickup truck | Performing Operations; Transporting | 45 | Expired |
| US6454337B2 | Folding cargo bay cover for pickup truck | Performing Operations; Transporting | 27 | Expired |
| USD612561S1 | Computer cart | General | 27 | Expired |
| US6520559B1 | Folding cargo bay cover for pickup truck | Performing Operations; Transporting | 27 | Expired |
| US7735881B2 | Folding cargo bay cover for pickup truck | Emerging Cross-Sectional Technologies | 18 | Active |
| US7334807B2 | Vehicle step tube | Performing Operations; Transporting | 18 | Expired |
| US4411395A | Downrigger swivel base | Human Necessities | 18 | Expired |
| US4032133A | Roller positioning method and apparatus for buckle-type paper folding machine | Performing Operations; Transporting | 14 | Expired |
| USD637782S1 | Computer cart | General | 13 | Expired |
| US8205928B2 | Folding cargo bay cover for pickup truck | Emerging Cross-Sectional Technologies | 12 | Active |
| US4104917A | Trolling wire | Physics | 11 | Expired |
| USD645630S1 | Computer cart | General | 9 | Expired |
| US7036861B2 | Cargo compartment organizer | Performing Operations; Transporting | 7 | Expired |
| US9669689B2 | Folding cargo bay cover for pickup truck | Emerging Cross-Sectional Technologies | 6 | Active |
| US7195299B2 | Cargo compartment organizer | Performing Operations; Transporting | 6 | Expired |
| US8205844B1 | Connector assembly | Emerging Cross-Sectional Technologies | 3 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.