Douglas F. DeVries
36Patents
23h-index
20Co-inventors
85Inventor score
Filing activity: Nov 1, 1984 → Apr 4, 2022
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US7188621B2 | Portable ventilator system | Mechanical Engineering; Lighting; Heating | 262 | Expired |
| US5868133A | Portable drag compressor powered mechanical ventilator | Human Necessities | 216 | Expired |
| US6877511B2 | Portable drag compressor powered mechanical ventilator | Human Necessities | 197 | Expired |
| US6102038A | Exhalation valve for mechanical ventilator | Human Necessities | 195 | Expired |
| US6526970B2 | Portable drag compressor powered mechanical ventilator | Human Necessities | 175 | Expired |
| US4527557A | Medical ventilator system | Human Necessities | 171 | Expired |
| US5127400A | Ventilator exhalation valve | Human Necessities | 167 | Expired |
| US5694926A | Portable drag compressor powered mechanical ventilator | Human Necessities | 142 | Expired |
| US7222623B2 | Portable drag compressor powered mechanical ventilator | Human Necessities | 122 | Expired |
| US5494028A | Medical ventilator | Human Necessities | 115 | Expired |
| US7849854B2 | Portable drag compressor powered mechanical ventilator | Human Necessities | 111 | Expired |
| US5881722A | Portable drag compressor powered mechanical ventilator | Human Necessities | 98 | Expired |
| US6152135A | Ventilator system | Human Necessities | 98 | Expired |
| US4602653A | Electronically-controlled gas blending system | Emerging Cross-Sectional Technologies | 97 | Expired |
| US4993269A | Variable orifice flow sensing apparatus | Physics | 97 | Expired |
| US5072729A | Ventilator exhalation valve | Human Necessities | 96 | Expired |
| US8118024B2 | Mechanical ventilation system utilizing bias valve | Mechanical Engineering; Lighting; Heating | 80 | Active |
| US4794922A | Ventilator manifold | Human Necessities | 53 | Expired |
| US7527053B2 | Method and apparatus for attenuating compressor noise | Mechanical Engineering; Lighting; Heating | 50 | Expired |
| US5014694A | Ambient pressure air/oxygen blender | Human Necessities | 37 | Expired |
| US8627819B2 | Portable ventilator system | Mechanical Engineering; Lighting; Heating | 31 | Active |
| US8156937B2 | Portable ventilator system | Human Necessities | 28 | Active |
| US8297279B2 | Portable ventilator system | Mechanical Engineering; Lighting; Heating | 23 | Active |
| US8522780B2 | Portable ventilator system | Mechanical Engineering; Lighting; Heating | 23 | Active |
| US10046134B2 | Pressure swing adsorption oxygen generator | Performing Operations; Transporting | 23 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.