David E. McDowell
25Patents
17h-index
21Co-inventors
81Inventor score
Filing activity: Oct 29, 1976 → Apr 30, 2021
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6131237A | Upright extraction cleaning machine | Chemistry; Metallurgy | 236 | Expired |
| US6446302B1 | Extraction cleaning machine with cleaning control | Human Necessities | 177 | Expired |
| US7013528B2 | Floor cleaner with dusting | Human Necessities | 167 | Expired |
| US7247181B2 | Cyclonic dirt separation module | Emerging Cross-Sectional Technologies | 141 | Expired |
| US7188388B2 | Vacuum cleaner with detachable cyclonic vacuum module | Emerging Cross-Sectional Technologies | 70 | Expired |
| US6810557B2 | Cyclone separator with vacillating debris inhibitor | Emerging Cross-Sectional Technologies | 57 | Expired |
| US7748079B2 | Cyclone separator with fine particle separation member | Performing Operations; Transporting | 51 | Active |
| US4910828A | Cleaning apparatus | Human Necessities | 47 | Expired |
| US4766638A | Four-way vacuum cleaner | Human Necessities | 41 | Expired |
| US4357727A | Dual brush floor sweeper | Human Necessities | 32 | Expired |
| US6898820B2 | Extraction cleaning with heating | Chemistry; Metallurgy | 30 | Expired |
| US7918909B2 | Cyclone separator with fine particle separation member | Emerging Cross-Sectional Technologies | 29 | Active |
| US4644605A | Stick vacuum cleaner | Human Necessities | 29 | Expired |
| USRE32751E | Stick vacuum cleaner | General | 28 | Expired |
| US7062816B2 | Surface cleaner with power drive | Mechanical Engineering; Lighting; Heating | 22 | Expired |
| US5189755A | Wet vacuum/extractor and cleaning solution tank therefor | Human Necessities | 21 | Expired |
| US4042997A | Vacuum cleaner with improved brush | Human Necessities | 18 | Expired |
| US5086537A | Compact extractor | Human Necessities | 15 | Expired |
| US7752705B2 | Extraction cleaning with heating | Electricity | 14 | Active |
| US10376124B2 | Surface cleaning apparatus | Electricity | 12 | Active |
| US7475712B2 | Extraction cleaning with tank mounting | Electricity | 11 | Active |
| US4636232A | Filter stack | Emerging Cross-Sectional Technologies | 8 | Expired |
| US11006536B2 | Deployable hardened housing units | Electricity | 3 | Active |
| US10653022B2 | Deployable hardened housing units | Electricity | 2 | Active |
| US11659670B2 | Deployable hardened housing units | Electricity | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.