David E. Cowan
12Patents
6h-index
9Co-inventors
59Inventor score
Filing activity: Jun 27, 1994 → Jul 2, 2018
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6182600A | Traffic channeling device | Fixed Constructions | 36 | Expired |
| USD406543S | Traffic channelizer | General | 29 | Expired |
| USD533281S1 | Barrier with interlocking sides | General | 16 | Expired |
| US5421668A | Tread ballast or weight for temporary traffic control devices and posts | Fixed Constructions | 15 | Expired |
| US7588387B1 | Barriers with interlocking sides | Fixed Constructions | 11 | Active |
| US7922420B2 | Barriers with kiss-offs | Fixed Constructions | 6 | Active |
| USD924405S1 | Portable oxygen device | General | 5 | Active |
| US6769207B1 | Portable sign assembly | Physics | 4 | Expired |
| US9849312B1 | Portable chemical oxygen generator | Human Necessities | 2 | Active |
| US10556135B2 | Portable chemical oxygen generator | Human Necessities | 2 | Active |
| US10039942B2 | Portable chemical oxygen generator | Human Necessities | 0 | Active |
| US10926113B2 | Portable chemical oxygen generator | Human Necessities | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.